The possession of power inevitably spoils the free use of reason.

Genius is the ability to independently arrive at and understand concepts that would normally have to be taught by another person.

The light dove, cleaving the air in her free flight, and feeling its resistance, might imagine that its flight would be still easier in empty space.

Have the courage to use your own reason- That is the motto of enlightenment. "Foundations of the Metaphysics of Morals" (1785)

All trades, arts, and handiworks have gained by division of labor... Where the different kinds of work are not distinguished and divided, where everyone is a jack-of-all-trades, there manufactures remain still in the greatest barbarism.

A single line in the Bible has consoled me more than all the books I ever read besides.

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.