Standing armies shall in time be totally abolished.

A man who has tasted with profound enjoyment the pleasure of agreeable society will eat with a greater appetite than he who rode horseback for two hours. An amusing lecture is as useful for health as the exercise of the body.

Innocence is indeed a glorious thing; but, unfortunately, it does not keep very well and is easily led astray.

All our knowledge begins with the senses...

For peace to reign on Earth, humans must evolve into new beings who have learned to see the whole first.

We can judge the heart of a man by his treatment of animals.

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.