"Experience without theory is blind, but theory without experience is mere intellectual play"
"Live your life as though your every act were to become a universal law"
"Happiness is not an ideal of reason, but of imagination"
"It is not God's will merely that we should be happy, but that we should make ourselves happy"
"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"
"The busier we are, the more acutely we feel that we live, the more conscious we are of life"
"Thoughts without content are empty, intuitions without concepts are blind"
"All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason"
"Out of the crooked timber of humanity, no straight thing was ever made"
"Look closely. The beautiful may be small"
"Enlightenment is man's emergence from his self-imposed immaturity"
"I had to deny knowledge in order to make room for faith"
"Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness"
"There can be no doubt that all our knowledge begins with experience"
"Science is organized knowledge.
Wisdom is organized life"
"The death of dogma is the birth of morality"
"Always recognize that human individuals are ends, and do not use them as means to your end"
"Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end"
"Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily we reflect on them: the starry heavens above me and the moral law within me"
"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"
"Dare to think!"
"Rules for happiness: something to do, someone to love, something to hope for"
"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"