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It must be *possible* for the *I think* to accompany all my representations: for otherwise something would be represented within me that could not be ...more

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A similar experiment may be tried in metaphysics as regards the *intuition* of objects. If the intuition had to conform to the constitution of objects...more

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Metaphysics, a completely isolated and speculative branch of rational knowledge which is raised above all teachings of experience and rests on concept...more

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This experiment succeeds as hoped and promises to metaphysics, in its first part, which deals with those *a priori* concepts to which the correspondin...more

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It is true, no doubt, that this principle of the necessary unity of apperception is itself an identical and therefore an analytic proposition; but it ...more

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Settle, for sure and universally, what conduct will promote the happiness of a rational being.

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On the other hand, the moral law, although it gives no such prospect, does provide a fact absolutely inexplicable from any data of the world of sense ...more

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By this freedom the will of a rational being, as belonging to the sensuous world, recognizes itself to be, like all other efficient causes, necessaril...more

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Science is organized knowledge. Wisdom is organized life

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The whole interest of my reason, whether speculative or practical, is concentrated in the three following questions: What can I know? What should I do...more

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But only he who, himself enlightened, is not afraid of shadows.

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We have seen, therefore, that I am not allowed even to *assume*, for the sake of the necessary practical use of my reason *God, freedom, immortality*,...more

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But, though all our knowledge begins with experience, it by no means follows that all arises out of experience.

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Our critique is not opposed to the *dogmatic procedure* of reason in its pure knowledge as science (for science must always be dogmatic, that is, deri...more

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Act only according to that maxim whereby you can at the same time will that it should become a universal law.