Charles Darwin Quotes (161 quotes, page 3)

“Every morning during certain seasons of the year, the thrushes and blackbirds on all the lawns throughout the country draw out of their holes an astonishing number of worms; and this they could not do, unless they lay close to the surface.”

Charles Darwin book The Formation of Vegetable Mould through the Action of Worms

Source: The Formation of Vegetable Mould through the Action of Worms (1881), Chapter 1: Habits of Worms, p. 16. http://darwin-online.org.uk/content/frameset?pageseq=31&itemID=F1357&viewtype=image

Drawing , Country , Season

“I assume that cells, before their conversion into completely passive or "formed material," throw off minute granules or atoms, which circulate freely throughout the system, and when supplied with proper nutriment multiply by self-division, subsequently becoming developed into cells like those from which they were derived. These granules for the sake of distinctness may be called … gemmules. They are supposed to be transmitted from the parents to the offspring, and are generally developed in the generation which immediately succeeds, but are often transmitted in a dormant state during many generations and are then developed. Their development is supposed to depend on their union with other partially developed cells or gemmules which precede them in the regular course of growth. … Lastly, I assume that the gemmules in their dormant state have a mutual affinity for each other, leading to their aggregation either into buds or into the sexual elements. … These assumptions constitute the provisional hypothesis which I have called Pangenesis.”

Charles Darwin book The Variation of Animals and Plants under Domestication

volume II, chapter XXVII: "Provisional Hypothesis of Pangenesis", page 374 http://darwin-online.org.uk/content/frameset?pageseq=389&itemID=F877.2&viewtype=image
It is sometimes claimed that modern biologist are dogmatic "Darwinists" who uncritically accept all of Darwin's ideas. This is false: No one today accepts Darwin's hypothesis of gemmules and pangenesis.
The Variation of Animals and Plants under Domestication (1868)

Parent , Dependency

“I was a young man with unformed ideas. I threw out queries, suggestions, wondering all the time over everything, and to my astonishment, the ideas took like wildfire. People made a religion of them.”

Charles Darwin

Attributed to Darwin in another version of the Lady Hope fabrication.
Misattributed

People , Religion , Idea , Time

“The main difficulty in using either lazo or bolas, is to ride so well, as to be able at full speed, and while suddenly turning about, to whirl them so steadily round the head, as to take aim: on foot any person would soon learn the art. One day, as I was amusing myself by galloping and whirling the balls round my head, by accident the free one struck a bush; and its revolving motion being thus destroyed, it immediately fell to the ground, and like magic caught one hind leg of my horse; the other ball was then jerked out of my hand, and the horse fairly secured. Luckily he was an old practised animal, and knew what it meant; otherwise he would probably have kicked till he had thrown himself down. The Gauchos roared with laughter; they cried they had seen every sort of animal caught, but had never before seen a man caught by himself.”

Charles Darwin book The Voyage of the Beagle

Source: The Voyage of the Beagle (1839), chapter III: "Montevideo — Maldonado, etc.", page 51 http://darwin-online.org.uk/content/frameset?pageseq=70&itemID=F11&viewtype=image

Art , Jerk , Laughter , Learning

“I hate a Barnacle as no man ever did before, not even a Sailor in a slow-sailing ship.”

Charles Darwin

volume I, chapter IX: "Life at Down", page 385 http://darwin-online.org.uk/content/frameset?pageseq=405&itemID=F1452.1&viewtype=image; letter http://www.darwinproject.ac.uk/entry-1489 to William Darwin Fox (24 October 1852)
quoted in At Home: A Short History of Private Life (2011) by Bill Bryson
The Life and Letters of Charles Darwin (1887)

Hate

“What can be more curious than that the hand of a man, formed for grasping, that of a mole for digging, the leg of the horse, the paddle of the porpoise, and the wing of the bat, should all be constructed on the same pattern, and should include the same bones, in the same relative positions? … Hence the same names can be given to the homologous bones in widely different animals. We see the same great law in the construction of the mouths of insects: what can be more different than the immensely long spiral proboscis of a sphinx-moth, the curious folded one of a bee or bug, and the great jaws of a beetle?—yet all these organs, serving for such different purposes, are formed by infinitely numerous modifications of an upper lip, mandibles, and two pairs of maxillæ. Analogous laws govern the construction of the mouths and limbs of crustaceans. So it is with the flowers of plants. Nothing can be more hopeless than to attempt to explain this similarity of pattern in members of the same class, by utility or by the doctrine of final causes.”

Charles Darwin book On the Origin of Species (1859)

Source: On the Origin of Species (1859), chapter XIII: "Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs", pages 434-435 http://darwin-online.org.uk/content/frameset?pageseq=452&itemID=F373&viewtype=image

Law , Flowers , Bee , Animals

“The sight of a feather in a peacock’s tail, whenever I gaze at it, makes me sick!”

Charles Darwin

Letter https://www.darwinproject.ac.uk/letter/DCP-LETT-2743.xml to Asa Gray, 3 April 1860
Other letters, notebooks, journal articles, recollected statements

“A cell is a complex structure, with its investing membrane, nucleus, and nucleolus.”

Charles Darwin

"Pangenesis -- Mr. Darwin's Reply to Professor Delpino" Scientific Opinion (20 October 1869) page 426 http://darwin-online.org.uk/content/frameset?pageseq=1&itemID=F1748b&viewtype=image
Detractors sometimes claim Darwin thought that the cell was an undifferentiated mass of protoplasm. This quote proves otherwise.
Other letters, notebooks, journal articles, recollected statements

“It is often said that all the conditions for the first production of a living organism are now present, which could ever have been present. But if (and oh! what a big if!) we could conceive in some warm little pond, with all sorts of ammonia and phosphoric salts, light, heat, electricity, &c., present, that a proteine compound was chemically formed ready to undergo stillmore complex changes, at the present day such matter would be instantly devoured or absorbed, which would not have been the case before living creatures were formed.”

Charles Darwin

volume III, chapter I: "The Spread of Evolution", page 18 http://darwin-online.org.uk/content/frameset?pageseq=30&itemID=F1452.3&viewtype=image; letter to Joseph Hooker (1871)
The Life and Letters of Charles Darwin (1887)

Light , Change

“As it is certain that worms swallow many little stones, independently of those swallowed while excavating their burrows, it is probable that they serve, like mill-stones, to triturate their food.”

Charles Darwin book The Formation of Vegetable Mould through the Action of Worms

Source: The Formation of Vegetable Mould through the Action of Worms (1881), Chapter 1: Habits of Worms, p. 18. http://darwin-online.org.uk/content/frameset?pageseq=33&itemID=F1357&viewtype=image

Food

“… cell of a tentacle, showing the various forms successively assumed by the aggregated masses of protoplasm.”

Charles Darwin book Insectivorous Plants

Detractors sometimes claim Darwin thought that the cell was an undifferentiated mass of protoplasm. Anyone reading the passage above will realize that Darwin thought no such thing.
Source: Insectivorous Plants (1875), chapter III: "Aggregation of the Protoplasm within the Cells of the Tentacles", page 40 http://darwin-online.org.uk/content/frameset?pageseq=55&itemID=F1217&viewtype=image

Success

“Mere chance … alone would never account for so habitual and large an amount of difference as that between varieties of the same species.”

Charles Darwin book On the Origin of Species (1859)

Source: On the Origin of Species (1859), chapter IV: "Natural Selection", page 111 http://darwin-online.org.uk/content/frameset?pageseq=126&itemID=F373&viewtype=image

Chance

“In the year 1837, a short paper was read by me before the Geological Society of London, "On the Formation of Mould," in which it was shown that small fragments of burnt marl, cinders, &c., which had been thickly strewed over the surface of several meadows, were found after a few years lying at the depth of some inches beneath the turf, but still forming a layer.”

Charles Darwin book The Formation of Vegetable Mould through the Action of Worms

Introduction, p. 3. http://darwin-online.org.uk/content/frameset?pageseq=18&itemID=F1357&viewtype=image
The Formation of Vegetable Mould through the Action of Worms (1881)
Source: 'Transactions Geolog. Soc.' vol. v. p. 505. Read November 1, 1837.

Lying , Reading

“Vox populi, vox Dei is Latin for "The voice of the people is the voice of God". "Sarcode" is an archaic term for protoplasm.”

Charles Darwin book On the Origin of Species (1859)

On the Origin of Species (1859)

God , People

“I often find myself going back to Darwin's saying about the duration of a man's friendships being one of the best measures of his worth.”

Charles Darwin

from Records of Tennyson, Ruskin, Browning by Anne Thackeray Ritchie http://www.victorianweb.org/books/aplin.html (Harper and Brothers, New York, 1893) page 170
Other letters, notebooks, journal articles, recollected statements

Friendship

“The chief distinction in the intellectual powers of the two sexes is shewn by man attaining to a higher eminence, in whatever he takes up, than woman can attain — whether requiring deep thought, reason, or imagination, or merely the use of the senses and hands. If two lists were made of the most eminent men and women in poetry, painting, sculpture, music, — comprising composition and performance, history, science, and philosophy, with half-a-dozen names under each subject, the two lists would not bear comparison. We may also infer, from the law of the deviation of averages, so well illustrated by Mr. Galton, in his work on 'Hereditary Genius,' that if men are capable of decided eminence over women in many subjects, the average standard of mental power in man must be above that of woman. … Thus man has ultimately become superior to woman.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XIX: "Secondary Sexual Characters of Man", pages 327-328 http://darwin-online.org.uk/content/frameset?pageseq=344&itemID=F937.2&viewtype=image
The Descent of Man (1871)

Women , Men , Law , Music

“The western nations of Europe, who now so immeasurably surpass their former savage progenitors, and stand at the summit of civilisation, owe little or none of their superiority to direct inheritance from the old Greeks, though they owe much to the written works of that wonderful people.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter V: "On the Development of the Intellectual and Moral Faculties during Primeval and Civilised Times" (second edition, 1874) page 141 http://darwin-online.org.uk/content/frameset?pageseq=164&itemID=F944&viewtype=image
The Descent of Man (1871)

People

“[blind_man] A mathematician is a blind man in a dark room looking for a black cat which isn't there.”

Charles Darwin

This is attributed, with an expression of doubt as to its correctness, in Mathematics, Our Great Heritage: Essays on the Nature and Cultural Significance of Mathematics (1948) by William Leonard Schaaf, p. 163; also attributed in Pi in the Sky : Counting, Thinking and Being (1992) by John D. Barrow. There are a number of similar expressions to this with various attributions, but the earliest published variants seem to be quotations of Lord Bowen:
When I hear of an 'equity' in a case like this, I am reminded of a blind man in a dark room — looking for a black hat — which isn't there.
Lord Bowen, as quoted in "Pie Powder", Being Dust from the Law Courts, Collected and Recollected on the Western Circuit, by a Circuit Tramp (1911) by John Alderson Foote; this seems to be the earliest account of any similar expression. It is mentioned by the author that this expression has become misquoted as a "black cat" rather than "black hat."
An earlier example with "hat" as a learned judge is said to have defined the metaphysician, namely, as a blind man looking for a black hat in a dark room, the hat in question not being there Edinburgh Medical Journal, Volume 3 (1898)
With his obscure and uncertain speculations as to the intimate nature and causes of things, the philosopher is likened to a 'blind man in a dark room looking for a black cat that is not there.'
William James, himself apparently quoting someone else's expression, in Some Problems of Philosophy : A Beginning of an Introduction to Philosophy (1911) Ch. 1 : Philosophy and its Critics
A blind man in a dark room seeking for a black cat — which is not there.
A definition of metaphysics attributed to Lord Bowen, as quoted in Science from an Easy Chair (1913) by Edwin Ray Lankester, p. 99
A blind man in a dark room looking for a black cat which isn't there.
A definition of metaphysics attributed to Lord Balfour, as quoted in God in Our Work: Religious Addresses (1949) by Richard Stafford Cripps, p. 72
A philosopher is a blind man in a dark room looking for a black cat that isn't there. A theologian is the man who finds it.
H. L. Mencken, as quoted in Peter's Quotations : Ideas for Our Time (1977) by Laurence J. Peter, p. 427
A metaphysician is like a blind man in a dark room, looking for a black cat — which isn't there.
Variant published in Smiles and Chuckles (1952) by B. Hagspiel
Misattributed

Cats

“Animals whom we have made our slaves we do not like to consider our equals. — Do not slave holders wish to make the black man other kind? — animals with affections, imitation, fear of death, pain, sorrow for the dead.”

Charles Darwin

respect.
" Notebook B http://darwin-online.org.uk/EditorialIntroductions/vanWyhe_notebooks.html" (1837-1838) page 231 http://darwin-online.org.uk/content/frameset?pageseq=233&itemID=CUL-DAR121.-&viewtype=side
quoted in [2009, Darwin's Sacred Cause: How a Hatred of Slavery Shaped Darwin's Views on Human Evolution, Adrian Desmond & James Moore, New York, Houghton Mifflin Harcourt, 9780547055268, 23042290M, 115, http://books.google.com/books?id=V9cGkBj_8iYC&pg=PA115&dq="Animals+whom+we+have+made+our+slaves"]
Other letters, notebooks, journal articles, recollected statements

Death , Pain , Fear , Animals

“All animals feel Wonder, and many exhibit Curiosity. They sometimes suffer from this latter quality, as when the hunter plays antics and thus attracts them.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter II: "Comparison of the Mental Powers of Man and the Lower Animals", page 42 http://darwin-online.org.uk/content/frameset?pageseq=55&itemID=F937.1&viewtype=image
The Descent of Man (1871)

Feeling , Suffering , Animals

“A republic cannot succeed, till it contains a certain body of men imbued with the principles of justice and honour.”

Charles Darwin book The Voyage of the Beagle

Source: The Voyage of the Beagle (1839), chapter VII: "Excursion to St. Fe, etc.", entry for 18-19 October 1833, page 165 http://darwin-online.org.uk/content/frameset?viewtype=image&itemID=F11&pageseq=184

Men , Justice

“Law of Battle. — With savages, for instance the Australians, the women are the constant cause of war both between members of the same tribe and between distinct tribes. So no doubt it was in ancient times; "nam fuit ante Helenam mulier teterrima belli causa." With some of the North American Indians, the contest is reduced to a system. … With the Guanas of South America, Azara states that the men rarely marry till twenty years old or more, as before that age they cannot conquer their rivals.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

second edition (1874), chapter XIX: "Secondary Sexual Characters of Man", pages 561-562 http://darwin-online.org.uk/content/frameset?pageseq=584&itemID=F944&viewtype=image
Darwin quoted Horace in Latin: "For even before Helen (of Troy) a woman was a most hideous cause of war"
The Descent of Man (1871)

Women , Men , War , Age

“I have rarely read anything which has interested me more, though I have not read as yet more than a quarter of the book proper. From quotations which I had seen, I had a high notion of Aristotle's merits, but I had not the most remote notion what a wonderful man he was. Linnaeus and Cuvier have been my two gods, though in very different ways, but they were mere schoolboys to old Aristotle.”

Charles Darwin

volume III, chapter VI: "Miscellanea", page 252 http://darwin-online.org.uk/content/frameset?pageseq=264&itemID=F1452.3&viewtype=image; letter to William Ogle (22 February 1882)
Ogle had translated Aristotle's Parts of Animals and sent Darwin a copy.
The Life and Letters of Charles Darwin (1887)

God , Books , Way , Reading

“Dr. Grant took me occasionally to the meetings of the Wernerian Society, where various papers on natural history were read, discussed, and afterwards published in the 'Transactions.' I heard Audubon deliver there some interesting discourses on the habits of N. American birds, sneering somewhat unjustly at Waterton. By the way, a negro lived in Edinburgh, who had travelled with Waterton, and gained his livelihood by stuffing birds, which he did excellently: he gave me lessons for payment, and I used often to sit with him, for he was a very pleasant and intelligent man.”

Charles Darwin

volume I, chapter II: "Autobiography", page 40 http://darwin-online.org.uk/content/frameset?pageseq=58&itemID=F1452.1&viewtype=image
The Life and Letters of Charles Darwin (1887)

Way , Travel , History , Intelligence

“It will be seen that I look at the term species, as one arbitrarily given for the sake of convenience to a set of individuals closely resembling each other, and that it does not essentially differ from the term variety, which is given to less distinct and more fluctuating forms. The term variety, again, in comparison with mere individual differences, is also applied arbitrarily, and for mere convenience sake.”

Charles Darwin book On the Origin of Species (1859)

Source: On the Origin of Species (1859), chapter II: "Variation Under Nature", page 52 http://darwin-online.org.uk/content/frameset?pageseq=67&itemID=F373&viewtype=image

“With savages, the weak in body or mind are soon eliminated; and those that survive commonly exhibit a vigorous state of health. We civilised men, on the other hand, do our utmost to check the process of elimination; we build asylums for the imbecile, the maimed, and the sick; we institute poor-laws; and our medical men exert their utmost skill to save the life of every one to the last moment. There is reason to believe that vaccination has preserved thousands, who from a weak constitution would formerly have succumbed to small-pox. Thus the weak members of civilised societies propagate their kind. No one who has attended to the breeding of domestic animals will doubt that this must be highly injurious to the race of man. It is surprising how soon a want of care, or care wrongly directed, leads to the degeneration of a domestic race; but excepting in the case of man himself, hardly any one is so ignorant as to allow his worst animals to breed.

The aid which we feel impelled to give to the helpless is mainly an incidental result of the instinct of sympathy, which was originally acquired as part of the social instincts, but subsequently rendered, in the manner previously indicated, more tender and more widely diffused. Nor could we check our sympathy, even at the urging of hard reason, without deterioration in the noblest part of our nature. The surgeon may harden himself whilst performing an operation, for he knows that he is acting for the good of his patient; but if we were intentionally to neglect the weak and helpless, it could only be for a contingent benefit, with an overwhelming present evil. We must therefore bear the undoubtedly bad effects of the weak surviving and propagating their kind; but there appears to be at least one check in steady action, namely that the weaker and inferior members of society do not marry so freely as the sound; and this check might be indefinitely increased by the weak in body or mind refraining from marriage, though this is more to be hoped for than expected.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter V: "On the Development of the Intellectual and Moral Faculties during Primeval and Civilised Times" (second edition, 1874) pages 133-134 http://darwin-online.org.uk/content/frameset?pageseq=156&itemID=F944&viewtype=image
The last sentence of the first paragraph is often quoted in isolation to make Darwin seem heartless.
The Descent of Man (1871)

Life , Men , Marriage , Health

“How I wish I had not expressed my theory of evolution as I have done.”

Charles Darwin

Claimed http://darwin-online.org.uk/content/frameset?itemID=A668&viewtype=text&pageseq=1 by the evangelist Lady Hope; Reported in [They Never Said It: A Book of Fake Quotes, Misquotes, & Misleading Attributions, 1989, Paul F., Jr., Boller, John, George, Oxford University Press, New York; Oxford, isbn - 978-0195064698, 88022115, [PN6081.B635 1989], 19] Darwin's daughter Henrietta refuted the claim, stating "I was present at his deathbed. Lady Hope was not present during his last illness, or any illness. I believe he never even saw her, but in any case she had no influence over him in any department of thought or belief. He never recanted any of his scientific views, either then or earlier. We think the story of his conversion was fabricated in the U.S.A. The whole story has no foundation whatever."
Misattributed

“I cannot pretend to throw the least light on such abstruse problems. The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an Agnostic.”

Charles Darwin

volume I, chapter VIII: "Religion", page 313 http://darwin-online.org.uk/content/frameset?pageseq=331&itemID=F1452.1&viewtype=image
The Life and Letters of Charles Darwin (1887)

Problem , Light

“As I was led to keep in my study during many months worms in pots filled with earth, I became interested in them, and wished to learn how far they acted consciously, and how much mental power they displayed.”

Charles Darwin book The Formation of Vegetable Mould through the Action of Worms

Introduction, p. 2-3. http://darwin-online.org.uk/content/frameset?pageseq=17&itemID=F1357&viewtype=image
The Formation of Vegetable Mould through the Action of Worms (1881)

Study , Learning

“In order that woman should reach the same standard as man, she ought, when nearly adult, to be trained to energy and perseverance, and to have her reason and imagination exercised to the highest point; and then she would probably transmit these qualities chiefly to her adult daughters. The whole body of women, however, could not be thus raised, unless during many generations the women who excelled in the above robust virtues were married, and produced offspring in larger numbers than other women. As before remarked with respect to bodily strength, although men do not now fight for the sake of obtaining wives, and this form of selection has passed away, yet they generally have to undergo, during manhood, a severe struggle in order to maintain themselves and their families; and this will tend to keep up or even increase their mental powers, and, as a consequence, the present inequality between the sexes.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XIX: "Secondary Sexual Characters of Man", page 329 http://darwin-online.org.uk/content/frameset?pageseq=346&itemID=F937.2&viewtype=image
The Descent of Man (1871)

Women , Men , Family , Sex

“There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.”

Charles Darwin book On the Origin of Species (1859)

Source: On the Origin of Species (1859), chapter XIV: "Recapitulation and Conclusion", page 490 http://darwin-online.org.uk/content/frameset?pageseq=508&itemID=F373&viewtype=image
Close of the first edition (1859). Only use of the term "evolve" or "evolution" in the first edition.
In the second http://darwin-online.org.uk/content/frameset?pageseq=508&itemID=F376&viewtype=image (1860) through sixth (1872) editions, Darwin added the phrase "by the Creator" to read:

Life , Law , Beauty

“When the principles of breeding and of inheritance are better understood, we shall not hear ignorant members of our legislature rejecting with scorn a plan for ascertaining by an easy method whether or not consanguineous marriages are injurious to man.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 403 http://darwin-online.org.uk/content/frameset?pageseq=420&itemID=F937.2&viewtype=image
The Descent of Man (1871)

Marriage

“There is one living spirit prevalent over this world, (subject to certain contingencies of organic matter & chiefly heat), which assumes a multitude of forms each having acting principle according to subordinate laws. — There is one thinking sensible principle, intimately allied to one kind of organic matter—have & which thinking principle seems to be given a assumed according to a more extended relations of the individuals, whereby choice with memory or reason? is necessary—which is modified into endless forms bearing a close relation in degree & kind to the endless forms of the living beings.”

Charles Darwin

" Notebook C http://darwin-online.org.uk/EditorialIntroductions/vanWyhe_notebooks.html" (1838) page 210e http://darwin-online.org.uk/content/frameset?pageseq=186&itemID=CUL-DAR122.-&viewtype=side
quoted in
also quoted in
Other letters, notebooks, journal articles, recollected statements

World , Law , Thinking , Memory

“I have not as yet noticed by far the most remarkable feature in the natural history of this archipelago; it is, that the different islands to a considerable extent are inhabited by a different set of beings. My attention was first called to this fact by the Vice-Governor, Mr. Lawson, declaring that the tortoises differed from the different islands, and that he could with certainty tell from which island any one was brought. I did not for some time pay sufficient attention to this statement, and I had already partially mingled together the collections from two of the islands. I never dreamed that islands, about fifty or sixty miles apart, and most of them in sight of each other, formed of precisely the same rocks, placed under a quite similar climate, rising to a nearly equal height, would have been differently tenanted; but we shall soon see that this is the case. It is the fate of most voyagers, no sooner to discover what is most interesting in any locality, than they are hurried from it; but I ought, perhaps, to be thankful that I obtained sufficient materials to establish this most remarkable fact in the distribution of organic beings.”

Charles Darwin book The Voyage of the Beagle

Source: The Voyage of the Beagle (1839), chapter XVII: "Galapagos Archipelago" (second edition, 1845), pages 393-394 http://darwin-online.org.uk/content/frameset?pageseq=406&itemID=F14&viewtype=image

Fate , Dreams , History , Nature

“It may be presumed that all animals which feed on various substances possess the sense of taste, and this is certainly the case with worms.”

Charles Darwin book The Formation of Vegetable Mould through the Action of Worms

Source: The Formation of Vegetable Mould through the Action of Worms (1881), Chapter 1: Habits of Worms, p. 32. http://darwin-online.org.uk/content/frameset?pageseq=47&itemID=F1357&viewtype=image

Sense , Animals

“Lamarck was the first man whose conclusions on this subject were published in 1801.”

Charles Darwin

L'Origine des espèces, 1859

“The real affinities of all organic beings are due to inheritance or community of descent.”

Charles Darwin

L'Origine des espèces, 1859

Communication

“It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance which is almost implied by reproduction; Variability from the indirect and direct action of the external conditions of life, and from use and disuse; a Ratio of Increase so high as to lead to a Struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.”

Charles Darwin book On the Origin of Species (1859)

Last paragraph of the first edition (1859). Only use of the term "evolve" or "evolution" in the first edition.
In the second http://darwin-online.org.uk/content/frameset?pageseq=508&itemID=F376&viewtype=image (1860) through sixth (1872) editions, Darwin added the phrase "by the Creator" to read:
There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.
Source: On the Origin of Species (1859), chapter XIV: "Recapitulation and Conclusion", page 489-90 http://darwin-online.org.uk/content/frameset?pageseq=508&itemID=F373&viewtype=image

Singing , Clothes , Dependency , Law

“There is one living spirit prevalent over this world, (subject to certain contingencies of organic matter & chiefly heat), which assumes a multitude of forms each having acting principle according to subordinate laws.”

Charles Darwin

There is one thinking sensible principle, intimately allied to one kind of organic matter—have & which thinking principle seems to be given a assumed according to a more extended relations of the individuals, whereby choice with memory or reason? is necessary—which is modified into endless forms bearing a close relation in degree & kind to the endless forms of the living beings.
" Notebook C http://darwin-online.org.uk/EditorialIntroductions/vanWyhe_notebooks.html" (1838) page 210e http://darwin-online.org.uk/content/frameset?pageseq=186&itemID=CUL-DAR122.-&viewtype=side
quoted in [Creativity, Psychology and the History of Science, 2005, Howard E., Gruber, Katja, Bödeker, Springer, 9781402034916, 142, http://books.google.com/books?id=MDbruQKIu-wC&pg=PA142]
also quoted in [The Cambridge Companion to Darwin, 2003, Robert J., Richards, Darwin on mind, morals, and emotions, Johnathan, Hodge, Gregory, Radick, Cambridge University Press, 9780521777308, 95-96, http://books.google.com/books?id=uj_by_Sg3LkC&pg=PA95]
Other letters, notebooks, journal articles, recollected statements

World , Law

“Man may be excused for feeling some pride at having risen, though not through his own exertions, to the very summit of the organic scale; and the fact of his having thus risen, instead of having been aboriginally placed there, may give him hopes for a still higher destiny in the distant future. But we are not here concerned with hopes or fears, only with the truth as far as our reason allows us to discover it. I have given the evidence to the best of my ability; and we must acknowledge, as it seems to me, that man with all his noble qualities, with sympathy which feels for the most debased, with benevolence which extends not only to other men but to the humblest living creature, with his god-like intellect which has penetrated into the movements and constitution of the solar system — with all these exalted powers — Man still bears in his bodily frame the indelible stamp of his lowly origin.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 405 http://darwin-online.org.uk/content/frameset?pageseq=422&itemID=F937.2&viewtype=image
Closing paragraph of the book.
The Descent of Man (1871)

God , Future , Hope , Truth

“As man advances in civilisation, and small tribes are united into larger communities, the simplest reason would tell each individual that he ought to extend his social instincts and sympathies to all the members of the same nation, though personally unknown to him. This point being once reached, there is only an artificial barrier to prevent his sympathies extending to the men of all nations and races. If, indeed, such men are separated from him by great differences in appearance or habits, experience unfortunately shews us how long it is before we look at them as our fellow-creatures. Sympathy beyond the confines of man, that is humanity to the lower animals, seems to be one of the latest moral acquisitions. It is apparently unfelt by savages, except towards their pets. How little the old Romans knew of it is shewn by their abhorrent gladiatorial exhibitions. The very idea of humanity, as far as I could observe, was new to most of the Gauchos of the Pampas. This virtue, one of the noblest with which man is endowed, seems to arise incidentally from our sympathies becoming more tender and more widely diffused, until they are extended to all sentient beings. As soon as this virtue is honoured and practised by some few men, it spreads through instruction and example to the young, and eventually through public opinion.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter III: "Comparison of the Mental Powers of Man and the Lower Animals — continued", pages 100-101 http://darwin-online.org.uk/content/frameset?pageseq=113&itemID=F937.1&viewtype=image
The Descent of Man (1871)

Personality , Communication , Animals , Appearance

“To suppose that the eye with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest degree. When it was first said that the sun stood still and the world turned round, the common sense of mankind declared the doctrine false; but the old saying of Vox populi, vox Dei, as every philosopher knows, cannot be trusted in science. Reason tells me, that if numerous gradations from a simple and imperfect eye to one complex and perfect can be shown to exist, each grade being useful to its possessor, as is certainly the case; if further, the eye ever varies and the variations be inherited, as is likewise certainly the case; and if such variations should be useful to any animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, should not be considered as subversive of the theory. How a nerve comes to be sensitive to light, hardly concerns us more than how life itself originated; but I may remark that, as some of the lowest organisms, in which nerves cannot be detected, are capable of perceiving light, it does not seem impossible that certain sensitive elements in their sarcode should become aggregated and developed into nerves, endowed with this special sensibilites.”

Charles Darwin book On the Origin of Species (1859)

On the Origin of Species (1859)

Imagination , Light , Sun , Nature

“And thus, the forms of life throughout the universe become divided into groups subordinate to groups.”

Charles Darwin book On the Origin of Species (1859)

Source: On the Origin of Species (1859), chapter II: "Variation Under Nature", page 59

Universe , Life

“As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected.”

Charles Darwin book On the Origin of Species (1859)

From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form.
"Introduction", page 5 http://darwin-online.org.uk/content/frameset?pageseq=20&itemID=F373&viewtype=image
On the Origin of Species (1859)

Life , Chance , Nature

“I cannot persuade myself that a beneficent & omnipotent God would have designedly created the Ichneumonidæ with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice.”

Charles Darwin

Letter https://www.darwinproject.ac.uk/letter/DCP-LETT-2814.xml to Asa Gray, 22 May 1860
Other letters, notebooks, journal articles, recollected statements

Cats , God

“What a book a Devil’s chaplain might write on the clumsy, wasteful, blundering, low, and horridly cruel works of nature!”

Charles Darwin

Letter to J.D. Hooker, 13 July 1856
Other letters, notebooks, journal articles, recollected statements

Books , Nature