Quotes about duration
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upto the death of Aurangzeb in AD 1707
Ram Gopal, Indian Resistance to Early Muslim Invaders Upto 1206 A.D., 1983, p.101.
Indian Resistance to Early Muslim Invaders Upto 1206 A.D.

As quoted in Friedrich Engels's Origins of the Family, Private Property, and the State http://www.marxists.org/archive/marx/works/1884/origin-family/ch09.htm

Aphorism 291 of The Organon of the Healing Art http://www.homeopathyhome.com/reference/organon/organon.html.

The Ancient History of the Egyptians, Carthaginians, Assyrians, Babylonians, Medes and Persians, Macedonians, and Grecians, Vol. I, Eleventh Edition (1808), Preface, p. iii

The Law of Mind (1892)

Ramanuja. Vedarthasangraha §241, as quoted by Shyam Ranganathan " Rāmānuja (c. 1017 – c. 1137 CE) http://www.iep.utm.edu/ramanuja/," at Internet Encyclopedia of Philosophy, Accessed May 20. 2014.

Letter to F. Cobden (5 July 1835) during his visit to the United States, quoted in John Morley, The Life of Richard Cobden (London: T. Fisher Unwin, 1905), pp. 33-34.
1830s

Original Philosophy of Hypnotism The International College of Hypnosis & Hypnotherapy
Source: "The history of introspection reconsidered." 1980, p. 247

Source: Quote of Mondrian about 1914-1918; in 'Mondrian, Essays' ('Plastic art and pure plastic art', 1937 and his other essays, (1941-1943) by Piet Mondrian; Wittenborn-Schultz Inc., New York, 1945, p. 10; as cited in De Stijl 1917-1931 - The Dutch Contribution to Modern Art, by H.L.C. Jaffé http://www.dbnl.org/tekst/jaff001stij01_01/jaff001stij01_01.pdf; J.M. Meulenhoff, Amsterdam 1956, p. 43

"Ten Variable Stars of the Algol Type" http://books.google.com/books?id=UkdWAAAAYAAJ&pg=PA87 (1908) Annals of the Astronomical Observatory of Harvard College Vol.60. No.5

Quoted by Aristotle, Metaphysics (ca. 350 BC) Tr. Thomas Taylor, The Philosophical and Mathematical Commentaries of Proclus on the First Book of Euclid's Elements (1792) Vol. 1 https://books.google.com/books?id=AD1WAAAAYAAJ, p. xix.

“By protracting life, we do not deduct one jot from the duration of death.”
Nec prorsum vitam ducendo demimus hilum
tempore de mortis nec delibare valemus.
Book III, lines 1087–1088 (tr. Rouse)
De Rerum Natura (On the Nature of Things)

Religion and Philosophy in Germany, A fragment https://archive.org/stream/religionandphilo011616mbp#page/n5/mode/2up. p. 25
Context: I believe in progress; I believe that happiness is the goal of humanity, and I cherish a higher idea of the Divine Being than those pious folk who suppose that man was created only to suffer. Even here on earth I would strive, through the blessings of free political and industrial institutions, to bring about that reign of felicity which, in the opinion of the pious, is to be postponed till heaven is reached after the day of Judgment. The one expectation is perhaps as vain as the other; there may be no resurrection of humanity either in a political or in a religious sense. Mankind, it may be, is doomed to eternal misery; the nations are perhaps under a perpetual curse, condemned to be trodden under foot by despots, to be made the instruments of their accomplices and the laughing-stocks of their menials. Yet, though all this be the case, it will be the duty even of those who regard Christianity as an error still to uphold it; and men must journey barefoot through Europe, wearing monks' cowls, preaching the doctrine of renunciation and the vanity of all earthly possessions, holding up before the gaze of a scourged and despised humanity the consoling Cross, and promising, after death, all the glories of heaven.
The duration of religions has always been dependent on human need for them. Christianity has been a blessing for suffering humanity during eighteen centuries; it has been providential, divine, holy. All that it has done in the interest of civilisation, curbing the strong and strengthening the weak, binding together the nations through a common sympathy and a common tongue, and all else that its apologists have urged in its praise all this is as nothing compared with that great consolation it has bestowed on man. Eternal praise is due to the symbol of that suffering God, the Saviour with the crown of thorns, the crucified Christ, whose blood was as a healing balm that flowed into the wounds of humanity. The poet especially must acknowledge with reverence the terrible sublimity of this symbol.

"The Individual in the Animal Kingdom" (1912); quoted in From Gaia to Selfish Genes: Selected Writings in the Life Sciences (1992) by Connie Barlow, Ch. 6 "Blurred Bounds of Individuality" <!-- Barlow in quoting Huxley also notes that modern science has revealed that clone-propagating blueberries in an Appalachian mountaintop and Aspens of the Rockies may have root-stocks ten or fifteen thousand years old. -->
Context: In the actual duration of his life, the individual ranges from the bacterium's hour to the the big tree's five thousand years. Man in this again stands at the pinnacle of individuality — not in mere length of days, but in having found a means to perpetuate a part of himself in spite of death.
By speech first, but far more by writing, man has been able to put something of himself beyond death. In tradition and in books an integral part of the individual persists, for it can influence the minds and actions of other people in different places and at different times: a row of black marks on a page can move a man to tears, though the bones of him that wrote it are long ago crumbled to dust. In truth, the whole progress of civilization is based upon this power. Once more the upward progress of terrestrial life towards individuality has found apparently insurmountable obstacles, gross material difficulties before it, but once more through consciousness it finds wings, and, laughing at matter, flies over lightly where it could not climb.
To such an individuality, one that can thus transcend the limits of its substance, the name Personality is commonly given. Man alone possesses true personality, though there is as it were an aspiration towards it visible among the higher vertebrates, stirring their placid automatism with airs of consciousness.

Entry (1961)
Eric Hoffer and the Art of the Notebook (2005)
Context: Originality is not something continuous but something intermittent — a flash of the briefest duration. One must have the time and be watchful (be attuned) to catch the flash and fix it. One must know how to catch and preserve these scant flakes of gold sluiced out of the sand and rocks of everyday life. Originality does not come nugget-size.
The Libertarian as Conservative (1984)
Context: You might object that what I’ve said may apply to the minarchist majority of libertarians, but not to the self-styled anarchists among them. Not so. To my mind a right-wing anarchist is just a minarchist who’d abolish the state to his own satisfaction by calling it something else. But this incestuous family squabble is no affair of mine. Both camps call for partial or complete privatization of state functions but neither questions the functions themselves. They don’t denounce what the state does, they just object to who’s doing it. This is why the people most victimized by the state display the least interest in libertarianism. Those on the receiving end of coercion don’t quibble over their coercers’ credentials. If you can’t pay or don’t want to, you don’t much care if your deprivation is called larceny or taxation or restitution or rent. If you like to control your own time, you distinguish employment from enslavement only in degree and duration.

Source: The Book on the Taboo Against Knowing Who You Are (1966), p. 111-112

Source: LSD : My Problem Child (1980), Ch. 1 : How LSD Originated
Context: This self-experiment showed that LSD-25 behaved as a psychoactive substance with extraordinary properties and potency. There was to my knowledge no other known substance that evoked such profound psychic effects in such extremely low doses, that caused such dramatic changes in human consciousness and our experience of the inner and outer world.
What seemed even more significant was that I could remember the experience of LSD inebriation in every detail. This could only mean that the conscious recording function was not interrupted, even in the climax of the LSD experience, despite the profound breakdown of the normal world view. For the entire duration of the experiment, I had even been aware of participating in an experiment, but despite this recognition of my condition, I could not, with every exertion of my will, shake off the LSD world. Everything was experienced as completely real, as alarming reality; alarming, because the picture of the other, familiar everyday reality was still fully preserved in the memory for comparison.
Another surprising aspect of LSD was its ability to produce such a far-reaching, powerful state of inebriation without leaving a hangover. Quite the contrary, on the day after the LSD experiment I felt myself to be, as already described, in excellent physical and mental condition.
I was aware that LSD, a new active compound with such properties, would have to be of use in pharmacology, in neurology, and especially in psychiatry, and that it would attract the interest of concerned specialists. But at that time I had no inkling that the new substance would also come to be used beyond medical science, as an inebriant in the drug scene. Since my self-experiment had revealed LSD in its terrifying, demonic aspect, the last thing I could have expected was that this substance could ever find application as anything approaching a pleasure drug.

Book 7, Ch. 5
Enquiry Concerning Political Justice (1793)

Citoyens, vouliez-vous une révolution sans révolution?
"Answer to Louvet's Accusation" (5 November 1792) Réponse à J.- B. Louvet http://www.royet.org/nea1789-1794/archives/discours/robespierre_reponse_louvet.htm, a speech to the National Convention (5 November 1792)
Kashf ul Mahjoob, Chapter I, Affirmation of Knowledge, p. 80
Kashf ul Mahjoob

Source: The Characteristics of the Present Age (1806), p. 268

Goel, S. R. (2015). Hindu society under siege. (Ch. 3. The Residue of Christianism)

“History is intercourse with greatness and duration. It allows us to rise above time.”
...that was tempting. But he couldn't earn any money with it.
The Discovery of Slowness (1983, 1987)

From ‘’Justice’’ in Unspoken Sermons Series III (1889)

Notes on Hospitals 3rd Edition (1863), Preface

"Returning happiness to the people" speeches
Source: PM to shorten 'Return to happiness' speeches but in the end happiness is never come true http://www.nationmultimedia.com/politics/PM-to-shorten-Return-to-happiness-speeches-30257143.html (31 March 2015)

“Any lie has a condemnation: its duration. Time, sooner or later, will manifest the truth.”
Original: Qualsiasi bugia ha una condanna: la sua durata. Il tempo, prima o poi, manifesterà la verità.
Source: prevale.net

Original: Amanti della notte, cerchiamo di comporre note dalle nostre azioni, senza alcuna durata, ma solo con la voglia di trasmettere emozioni.
Source: prevale.net