Immanuel Kant: Use

“Nature does nothing in vain, and in the use of means to her goals she is not prodigal.”

Immanuel Kant

Third Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)
Context: Nature does nothing in vain, and in the use of means to her goals she is not prodigal. Her giving to man reason and the freedom of the will which depends upon it is clear indication of her purpose. Man accordingly was not to be guided by instinct, not nurtured and instructed with ready-made knowledge; rather, he should bring forth everything out of his own resources.

Nature

“All that is required for this enlightenment is freedom; and particularly the least harmful of all that may be called freedom, namely, the freedom for man to make public use of his reason in all matters.”

Immanuel Kant

What is Enlightenment? (1784)
Context: A public can only arrive at enlightenment slowly. Through revolution, the abandonment of personal despotism may be engendered and the end of profit-seeking and domineering oppression may occur, but never a true reform of the state of mind. Instead, new prejudices, just like the old ones, will serve as the guiding reins of the great, unthinking mass.
All that is required for this enlightenment is freedom; and particularly the least harmful of all that may be called freedom, namely, the freedom for man to make public use of his reason in all matters. But I hear people clamor on all sides: Don't argue! The officer says: Don't argue, drill! The tax collector: Don't argue, pay! The pastor: Don't argue, believe!

Freedom

“Reason in a creature is a faculty of widening the rules and purposes of the use of all its powers far beyond natural instinct; it acknowledges no limits to its projects. Reason itself does not work instinctively, but requires trial, practice, and instruction in order gradually to progress from one level of insight to another.”

Immanuel Kant

Idea for a Universal History from a Cosmopolitan Point of View (1784)
Context: Reason in a creature is a faculty of widening the rules and purposes of the use of all its powers far beyond natural instinct; it acknowledges no limits to its projects. Reason itself does not work instinctively, but requires trial, practice, and instruction in order gradually to progress from one level of insight to another. Therefore a single man would have to live excessively long in order to learn to make full use of all his natural capacities. Since Nature has set only a short period for his life, she needs a perhaps unreckonable series of generations, each of which passes its own enlightenment to its successor in order finally to bring the seeds of enlightenment to that degree of development in our race which is completely suitable to Nature’s purpose. This point of time must be, at least as an ideal, the goal of man’s efforts, for otherwise his natural capacities would have to be counted as for the most part vain and aimless. This would destroy all practical principles, and Nature, whose wisdom must serve as the fundamental principle in judging all her other offspring, would thereby make man alone a contemptible plaything.

Second Thesis
Paraphrased variant: Reason does not work instinctively, but requires trial, practice, and instruction in order to gradually progress from one level of insight to another.

Nature

“Have the courage to use your own reason- That is the motto of enlightenment.
"Foundations of the Metaphysics of
Morals" (1785)”

Immanuel Kant

Courage

“Sapere Aude! Have the courage to use your own intelligence!”

Immanuel Kant

What is Enlightenment? (1784)
Variant: Have the courage to use your own reason- That is the motto of enlightenment.
Source: Groundwork of the Metaphysics of Morals
Context: Enlightenment is man’s leaving his self-caused immaturity. Immaturity is the incapacity to use one's intelligence without the guidance of another. Such immaturity is self-caused if it is not caused by lack of intelligence, but by lack of determination and courage to use one's intelligence without being guided by another. Sapere Aude! Have the courage to use your own intelligence! is therefore the motto of the enlightenment.

Intelligence , Courage

“Everyone can see that philosophy can have her belief in a millennium, but her millennarianism is not Utopian, since the Idea can help, though only from afar, to bring the millennium to pass. The only question is: Does Nature reveal anything of a path to this end? And I say: She reveals something, but very little. This great revolution seems to require so long for its completion that the short period during which humanity has been following this course permits us to determine its path and the relation of the parts to the whole with as little certainty as we can determine, from all previous astronomical observation, the path of the sun and his host of satellites among the fixed stars. Yet, on the fundamental premise of the systematic structure of the cosmos and from the little that has been observed, we can confidently infer the reality of such a revolution.
Moreover, human nature is so constituted that we cannot be indifferent to the most remote epoch our race may come to, if only we may expect it with certainty. Such indifference is even less possible for us, since it seems that our own intelligent action may hasten this happy time for our posterity. For that reason, even faint indications of approach to it are very important to us.”

Immanuel Kant

Eighth Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)

Confidence , Star , Intelligence , Idea

“The Palestinians living among us have, for the most part, earned a not unfounded reputation for being cheaters, because of their spirit of usury since their exile. Certainly, it seems strange to conceive of a nation of cheaters; but it is just as odd to think of a nation of merchants, the great majority of whom, bound by an ancient superstition that is recognized by the State they live in, seek no civil dignity and try to make up for this loss by the advantage of duping the people among whom they find refuge, and even one another. The situation could not be otherwise, given a whole nation of merchants, as non-productive members of society”

Immanuel Kant

for example, the Jews in Poland

page 77 of 6 December 2012 publication by Springer Science & Business Media https://books.google.ca/books?id=nRArBgAAQBAJ&pg=PA77, translation by Mary J. Gregor (The Hague: Martinus Nijhoff, 1974)

page 238 of "Cosmopolitics: Thinking and Feeling Beyond the Nation" https://books.google.ca/books?id=4EmqLCWUFvEC&pg=PA238 in 1998, page 221 of "Acts of Religion" https://books.google.ca/books?id=c_kgAmFbvP0C&pg=PA221 in 2002, page 235 of "Spinoza's Modernity: Mendelssohn, Lessing, and Heine" https://books.google.ca/books?id=CYcOfkrduWYC&pg=PA235 in 2004, page 44 of "Friedrich Schleiermacher: Between Enlightenment and Romanticism" https://books.google.ca/books?id=IYVDMuOFN20C&pg=PA44 in 2005, page 8 of "The Jewish Odyssey of George Eliot" https://books.google.ca/books?id=juCYcPWdqccC&pg=PA8 in 2010, page 155 of "Inhumanities: Nazi Interpretations of Western Culture" https://books.google.ca/books?id=YMIsYMw0ES0C&pg=PA155 in 2012, page 75 of "Romanticism/Judaica: A Convergence of Cultures" https://books.google.ca/books?id=4svsCwAAQBAJ&pg=PT75 in 2016 and page 39 of "Cosmopolitanisms and the Jews" https://books.google.ca/books?id=6kk_DwAAQBAJ&pg=PA39 in 2017 also quote this.
Anthropology from a Pragmatic Point of View (1798)

People , Thinking , Loss , Parting

“In the metaphysical elements of aesthetics the various nonmoral feelings are to be made use of; in the elements of moral metaphysics the various moral feelings of men, according to the differences in sex, age, education, and government, of races and climates, are to be employed.”

Immanuel Kant

Part III : Selection on Education from Kant's other Writings, Ch. I Pedagogical Fragments, # 58
The Educational Theory of Immanuel Kant (1904)

Men , Age , Education , Sex

“The public use of a man's reason must be free at all times, and this alone can bring enlightenment among men…”

Immanuel Kant

What is Enlightenment? (1784)

Men , Time

“All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.”

Immanuel Kant book Critique of Pure Reason

B 33
Critique of Pure Reason (1781; 1787)

Way

“Let us suppose there was a teacher of whom an historical record (or, at least, a widespread belief which is not basically disputable) reports that he was the first to expound publicly a pure and searching religion, comprehensible to the whole world. … Suppose that all he did was done even in the face of a dominant ecclesiastical faith which was onerous and not conducive to moral ends (a faith whose perfunctory worship can serve as a type of all the other faiths, at bottom merely statutory, which were current in the world at the time). Suppose, further, we find that he had made this universal religion of reason the highest and indispensable condition of every religious faith whatsoever … and this without further adding to this faith burdensome new ordinances or wishing to transform acts which he had initiated into peculiar holy practices, required in themselves as being constituent elements of religion. After this description one will not fail to recognize the person who can be referenced, not indeed as the founder of the religion which, free from every dogma, is engraved in all men’s hearts (for it does not have its origin in an arbitrary will), but as the founder of the first true church.”

Immanuel Kant

Book IV, Part 1, Section 1, “The Christian religion as a natural religion”
Religion within the Limits of Reason Alone (1793)

Men , World , Faith , Religion

“Mathematics, from the earliest times to which the history of human reason can reach, has followed, among that wonderful people of the Greeks, the safe way of science. But it must not be supposed that it was as easy for mathematics as for logic, in which reason is concerned with itself alone, to find, or rather to make for itself that royal road. I believe, on the contrary, that there was a long period of tentative work (chiefly still among the Egyptians), and that the change is to be ascribed to a revolution, produced by the happy thought of a single man, whose experiments pointed unmistakably to the path that had to be followed, and opened and traced out for the most distant times the safe way of a science. The history of that intellectual revolution, which was far more important than the passage round the celebrated Cape of Good Hope, and the name of its fortunate author, have not been preserved to us. … A new light flashed on the first man who demonstrated the properties of the isosceles triangle (whether his name was Thales or any other name), for he found that he had not to investigate what he saw hi the figure, or the mere concepts of that figure, and thus to learn its properties; but that he had to produce (by construction) what he had himself, according to concepts a priori, placed into that figure and represented in it, so that, in order to know anything with certainty a priori, he must not attribute to that figure anything beyond what necessarily follows from what he has himself placed into it, in accordance with the concept.”

Immanuel Kant book Critique of Pure Reason

Preface to the Second Edition [Tr. F. Max Müller], (New York, 1900), p. 690; as cited in: Robert Edouard Moritz, Memorabilia mathematica or, The philomath's quotation-book https://openlibrary.org/books/OL14022383M/Memorabilia_mathematica, Published 1914. p. 10
Critique of Pure Reason (1781; 1787)

People , Hope , Way , History

“In man (as the only rational creature on earth) those natural capacities which are directed to the use of his reason are to be fully developed only in the race, not in the individual.”

Immanuel Kant

Second Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)

Nature

“When the man governed by self-interest, the god of this world, does not renounce it but merely refines it by the use of reason and extends it beyond the constricting boundary of the present, he is represented (Luke XVI, 3-9) as one who, in his very person [as servant], defrauds his master [self- interest] and wins from him sacrifices in behalf of “duty.””

Immanuel Kant

Book IV, Part 1, Section 2, “The Christian religion as a natural religion”
Religion within the Limits of Reason Alone (1793)

God , World , Personality

“Here as elsewhere human reason in its pure use, so long as it was not critically examined, has first tried all possible wrong ways before it succeeded in finding the one true way.”

Immanuel Kant

Die menschliche Vernunft hat hier, wie allerwärts in ihrem reinen Gebrauche, so lange es ihr an Kritik fehlt, vorher alle mögliche unrechte Wege versucht, ehe es ihr gelingt, den einzigen wahren zu treffen.
Groundwork of the Metaphysics of Morals (1785)

Way

“Abbot Terrasson tells us that if the size of a book were measured not by the number of its pages but by the time required to understand it, then we could say about many books that they would be much shorter were they not so short.”

Immanuel Kant book Critique of Pure Reason

A xix
Critique of Pure Reason (1781; 1787)

Books , Understanding , Time

“The friction among men, the inevitable antagonism, which is a mark of even the largest societies and political bodies, is used by Nature as a means to establish a condition of quiet and security.”

Immanuel Kant

Seventh Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)
Context: What is the use of working toward a lawful civic constitution among individuals, i. e., toward the creation of a commonwealth? The same unsociability which drives man to this causes any single commonwealth to stand in unrestricted freedom in relation to others; consequently, each of them must expect from another precisely the evil which oppressed the individuals and forced them to enter into a lawful civic state. The friction among men, the inevitable antagonism, which is a mark of even the largest societies and political bodies, is used by Nature as a means to establish a condition of quiet and security. Through war, through the taxing and never-ending accumulation of armament, through the want which any state, even in peacetime, must suffer internally, Nature forces them to make at first inadequate and tentative attempts; finally, after devastations, revolutions, and even complete exhaustion, she brings them to that which reason could have told them at the beginning and with far less sad experience, to wit, to step from the lawless condition of savages into a league of nations. In a league of nations, even the smallest state could expect security and justice, not from its own power and by its own decrees, but only from this great league of nations … from a united power acting according to decisions reached under the laws of their united will.

Men , Nature

“The inscrutable wisdom through which we exist is not less worthy of veneration in respect to what it denies us than in respect to what it has granted.”

Immanuel Kant book Critique of Practical Reason

Critique of Practical Reason (1788)

Wisdom

“All natural philosophers, who wished to proceed mathematically in their work, have hence invariably (although unknown to themselves) made use of metaphysical principles, and must make use of such, it matters not how energetically they may otherwise repudiate any claim of metaphysics on their science.”

Immanuel Kant

Preface, Tr. Bax (1883)
(1786)

Mathematics , Nature , Science

“it is absurd … to hope that maybe another Newton may some day arise, to make intelligible to us even the genesis of but a blade of grass ("Dialectic of Teleological Judgment" §75)”

Immanuel Kant book Critique of Judgment

Critique of Judgment (1790)

Hope , Intelligence , Grass