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All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?

— Immanuel Kant Critique of Pure Reason (1781)

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Notes from Wikiquote

Chapter IV. The History of Pure Reason (4. Hauptstück. Die Geschichte der reinen Vernunft.)(A 852, B880)

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Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.

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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.

There must be a seed of every good thing in the character of men, otherwise no one can bring it out.

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

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That all our knowledge begins with experience there can be no doubt.

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Quote text and notes from Wikiquote: Immanuel Kant (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.