Immanuel Kant: Frasi in inglese (pagina 5)

“In the kingdom of ends everything has either a price or a dignity. What has a price can be replaced by something else as its equivalent; what on the other hand is raised above all price and therefore admits of no equivalent has a dignity.”

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Immanuel Kant

Im Reiche der Zwecke hat alles entweder einen Preis oder eine Würde. Was einen Preis hat, an dessen Stelle kann auch etwas anderes als Äquivalent gesetzt werden; was dagegen über allen Preis erhaben ist, mithin kein Äquivalent verstattet, das hat eine Würde.
434:32, M. Gregor, trans. (Cambridge: 1998), p. 42
Groundwork of the Metaphysics of Morals (1785)

“He [Jesus] claims that not the observance of outer civil or statutory churchly duties but the pure moral disposition of the heart alone can make man well-pleasing to God (Matthew V, 20-48); … that injury done one’s neighbor can be repaired only through satisfaction rendered to the neighbor himself, not through acts of divine worship (V, 24). Thus, he says, does he intend to do full justice to the Jewish law (V, 17); whence it is obvious that not scriptural scholarship but the pure religion of reason must be the law’s interpreter, for taken according to the letter, it allowed the very opposite of all this. Furthermore, he does not leave unnoticed, in his designations of the strait gate and the narrow way, the misconstruction of the law which men allow themselves in order to evade their true moral duty, holding themselves immune through having fulfilled their churchly duty (VII, 13). He further requires of these pure dispositions that they manifest themselves also in works (VII, 16) and, on the other hand, denies the insidious hope of those who imagine that, through invocation and praise of the Supreme Lawgiver in the person of His envoy, they will make up for their lack of good works and ingratiate themselves into favor (VII, 21). Regarding these works he declares that they ought to be performed publicly, as an example for imitation (V, 16), and in a cheerful mood, not as actions extorted from slaves (VI, 16); and that thus, from a small beginning in the sharing and spreading of such dispositions, religion, like a grain of seed in good soil, or a ferment of goodness, would gradually, through its inner power, grow into a kingdom of God (XIII, 31-33).”

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Immanuel Kant

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

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

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Immanuel Kant

What is Enlightenment? (1784)

“This problem is the most difficult and the last to be solved by mankind.”

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Immanuel Kant

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

“If the truth shall kill them, let them die.”

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Immanuel Kant

Generally attributed to Kant on social media, this is actually from a quotation by Ayn Rand paraphrasing Kant. Cited in Judgment Day: My Years with Ayn Rand http://books.google.com/books?id=d0tbAAAAMAAJ&q=%22If+the+truth+shall+kill+them,+let+them+die.%22&dq=%22If+the+truth+shall+kill+them,+let+them+die.%22&hl=de&sa=X&ei=6ax9VI6BE4SgyAPw_IKABg&ved=0CCgQ6AEwAQ (1989) by Nathaniel Brandon.
Misattributed

“All true metaphysics is taken from the essential nature of the thinking faculty itself, and therefore in nowise invented, since it is not borrowed from experience, but contains the pure operations of thought, that is, conceptions and principles à priori, which the manifold of empirical presentations first of all brings into legitimate connection, by which it can become empirical knowledge, i. e. experience. …mathematical physicists were thus quite unable to dispense with such metaphysical principles…”

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Immanuel Kant libro Metaphysical Foundations of Natural Science

Preface, Tr. Bax (1883)
Metaphysical Foundations of Natural Science (1786)

“All our knowledge falls with the bounds of experience.”

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Immanuel Kant libro Critica della ragion pura

A 146, B 185
Critique of Pure Reason (1781; 1787)

“The greatest problem for the human race, to the solution of which Nature drives man, is the achievement of a universal civic society which administers law among men.”

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Immanuel Kant

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

“It is so easy to be immature. If I have a book to serve as my understanding, a pastor to serve as my conscience, a physician to determine my diet for me, and so on, I need not exert myself at all. I need not think, if only I can pay: others will readily undertake the irksome work for me.”

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Immanuel Kant

Es ist so bequem, unmündig zu sein. Habe ich ein Buch, das für mich Verstand hat, einen Seelsorger, der für mich Gewissen hat, einen Arzt, der für mich die Diät beurtheilt u. s. w., so brauche ich mich ja nicht selbst zu bemühen. Ich habe nicht nöthig zu denken, wenn ich nur bezahlen kann.
What is Enlightenment? (1784)

“I maintain that in every special natural doctrine only so much science proper is to be met with as mathematics; for… science proper, especially of nature, requires a pure portion, lying at the foundation of the empirical, and based upon à priori knowledge of natural things. …the conception should be constructed. But the cognition of the reason through construction of conceptions is mathematical. A pure philosophy of nature in general, namely, one that only investigates what constitutes a nature in general, may thus be possible without mathematics; but a pure doctrine of nature respecting determinate natural things (corporeal doctrine and mental doctrine), is only possible by means of mathematics; and as in every natural doctrine only so much science proper is to be met with therein as there is cognition à priori, a doctrine of nature can only contain so much science proper as there is in it of applied mathematics.”

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Immanuel Kant libro Metaphysical Foundations of Natural Science

Preface, Tr. https://books.google.com/books?id=OCJLAAAAMAAJ Ernest Belfort Bax (1883)
Metaphysical Foundations of Natural Science (1786)

“Natural science is throughout either a pure or an applied doctrine of motion.”

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Immanuel Kant

Preface, Tr. Bax (1883)
(1786)

“Do what is right, though the world may perish.”

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Immanuel Kant

This is quoted as Kant in Building Academic Language: Essential Practices for Content Classrooms, Grades 5-12 (2007) by Jeff Zwiers, p. 202, but apparently derives from Kant's arguments in support of the far older Latin proverb Fiat iustitia, pereat mundus — "Do what is right though the world should perish." which was the subject of an essay: "Kant on the Maxim 'Do What Is Right Though the World Should Perish'" by Sissela Bok, in Argumentation 2 (February 1988). There was also a similar latin proverb Fiat iustitia ruat caelum — Let justice be done though the heavens fall.
Misattributed

“Even if there never have been actions arising from such pure sources, what is at issue here is not whether this or that happened; that, instead, reason by itself and independently of all appearances commands what ought to happen; that, accordingly, actions of which the world has perhaps so far given no example, and whose very practicability might be very much doubted by one who bases everything on experience, are still inflexibly commanded by reason … because … duty … lies, prior to all experience, in the idea of a reason determing the will by means of apriori grounds.”

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Immanuel Kant

Groundwork of the Metaphysics of Morals (1785)

“Human reason is by nature architectonic.”

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Immanuel Kant libro Critica della ragion pura

B 502
Critique of Pure Reason (1781; 1787)

“There is … only a single categorical imperative and it is this: Act only on that maxim through which you can at the same time will that it should become a universal law.”

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Immanuel Kant

Der kategorische Imperativ, der überhaupt nur aussagt, was Verbindlichkeit sei, ist: handle nach einer Maxime, welche zugleich als ein allgemeines Gesetz gelten kann.
Origine: Metaphysics of Morals (1797), Ch. 11

“Nature has willed that man should, by himself, produce everything that goes beyond the mechanical ordering of his animal existence, and that he should partake of no other happiness or perfection than that which he himself, independently of instinct, has created by his own reason.”

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Immanuel Kant

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

“For it is extremely absurd to expect to be enlightened by reason, and yet to prescribe to her beforehand on which side she must incline.”

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Immanuel Kant libro Critica della ragion pura

A 747, B 775; as translated by F. Max Mueller
Critique of Pure Reason (1781; 1787)

“For instance, if you have by a lie hindered a man who is even now planning a murder, you are legally responsible for all the consequences. But if you have strictly adhered to the truth, public justice can find no fault with you, be the unforeseen consequence what it may. It is possible that whilst you have honestly answered Yes to the murderer’s question, whether his intended victim is in the house, the latter may have gone out unobserved, and so not have come in the way of the murderer, and the deed therefore have not been done; whereas, if you lied and said he was not in the house, and he had really gone out (though unknown to you) so that the murderer met him as he went, and executed his purpose on him, then you might with justice be accused as the cause of his death. For, if you had spoken the truth as well as you knew it, perhaps the murderer while seeking for his enemy in the house might have been caught by neighbours coming up and the deed been prevented.”

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Immanuel Kant

On a Supposed Right to Tell Lies from Benevolent Motives (1797)

“Apart from moral conduct, all that man thinks himself able to do in order to become acceptable to God is mere superstition and religious folly.”

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Immanuel Kant

As quoted in German Thought, From The Seven Years' War To Goethe's Death : Six Lectures (1880) by Karl Hillebrand, p. 208
Contesto: As everybody likes to be honoured, so people imagine that God also wants to be honoured. They forget that the fulfilment of duty towards men is the only honour adequate to him. Thus is formed the conception of a religion of worship, instead of a merely moral religion. … Apart from moral conduct, all that man thinks himself able to do in order to become acceptable to God is mere superstition and religious folly. If once a man has come to the idea of a service which is not purely moral, but is supposed to be agreeable to God himself, or capable of propitiating him, there is little difference between the several ways of serving him. For all these ways are of equal value. … Whether the devotee accomplishes his statutory walk to the church, or whether he undertakes a pilgrimage to the sanctuaries of Loretto and Palestine, whether he repeats his prayer-formulas with his lips, or like the Tibetan, uses a prayer-wheel … is quite indifferent. As the illusion of thinking that a man can justify himself before God in any way by acts of worship is religious superstition, so the illusion that he can obtain this justification by the so-called intercourse with God is religious mysticism (Schwärmerei). Such superstition leads inevitably to sacerdotalism (Pfaffenthum) which will always be found where the essence is sought not in principles of morality, but in statutory commandments, rules of faith and observances.

“There will always be some people who think for themselves, even among the self-appointed guardians of the great mass who, after having thrown off the yoke of immaturity themselves, will spread about them the spirit of a reasonable estimate of their own value and of the need for every man to think for himself.”

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Immanuel Kant

What is Enlightenment? (1784)