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- “The only objects of practical reason are therefore those of good and evil. For by the former is meant an object necessarily desired according to a principle of reason; by the latter one necessarily shunned, also according to a principle of reason.” – Immanuel Kant
- “From such crooked wood as that which man is made of, nothing straight can be fashioned.” – Immanuel Kant
- “Nothing is divine but what is agreeable to reason.” – Immanuel Kant
- “What can I know? What ought I to do? What can I hope?” – Immanuel Kant
- “Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.” – Immanuel Kant
- “Experience without theory is blind, but theory without experience is mere intellectual play.” – Immanuel Kant
- “Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: ‘War is bad in that it begets more evil than it kills.’ ” – Immanuel Kant
- “Seek not the favor of the multitude; it is seldom got by honest and lawful means. But seek the testimony of few; and number not voices, but weigh them.” – Immanuel Kant
- “Happiness is not an ideal of reason, but of imagination.” – Immanuel Kant
- “Science is organized knowledge. Wisdom is organized life.” – Immanuel Kant
- “Religion is the recognition of all our duties as divine commands.” – Immanuel Kant
- “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
- “By a lie, a man… annihilates his dignity as a man.” – Immanuel Kant
- “It is not God’s will merely that we should be happy, but that we should make ourselves happy.” – Immanuel Kant
- “Ingratitude is the essence of vileness.” – Immanuel Kant
- “He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.” – Immanuel Kant
- “But although all our knowledge begins with experience, it does not follow that it arises from experience.” – Immanuel Kant
- “Act that your principle of action might safely be made a law for the whole world.” – Immanuel Kant
- “It is beyond a doubt that all our knowledge begins with experience.” – Immanuel Kant
- “To be is to do.” – Immanuel Kant
- “Out of timber so crooked as that from which man is made nothing entirely straight can be carved.” – Immanuel Kant
- “Live your life as though your every act were to become a universal law.” – Immanuel Kant
- “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
- “Metaphysics is a dark ocean without shores or lighthouse, strewn with many a philosophic wreck.” – Immanuel Kant
- “In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so.” – Immanuel Kant
- “May you live your life as if the maxim of your actions were to become universal law.” – Immanuel Kant
- “Immaturity is the incapacity to use one’s intelligence without the guidance of another.” – Immanuel Kant
- “A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.” – Immanuel Kant
- “All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.” – Immanuel Kant
- “Intuition and concepts constitute… the elements of all our knowledge, so that neither concepts without an intuition in some way corresponding to them, nor intuition without concepts, can yield knowledge.” – Immanuel Kant
- “Two things awe me most, the starry sky above me and the moral law within me.” – Immanuel Kant
- “I had therefore to remove knowledge, in order to make room for belief.” – Immanuel Kant
- “Always recognize that human individuals are ends, and do not use them as means to your end.” – Immanuel Kant
- “So act that your principle of action might safely be made a law for the whole world.” – Immanuel Kant
- “Thoughts without content are empty, intuitions without concepts are blind.” – Immanuel Kant
- “If man makes himself a worm he must not complain when he is trodden on.” – Immanuel Kant
- “It is not necessary that whilst I live I live happily; but it is necessary that so long as I live I should live honourably.” – Immanuel Kant