Force does not constitute right... obedience is due only to legitimate powers.

The happiest is he who suffers least; the most miserable is he who enjoys least.

A person who can break wind is not dead.

Civilization is a hopeless race to discover remedies for the evils it produces.

Supreme happiness consists in self-content; that we may gain this self-content, we are placed upon this earth and endowed with freedom.

A man who is not a fool can rid himself of every folly except vanity.

Teach your scholar to observe the phenomena of nature; you will soon rouse his curiosity, but if you would have it grow, do not be in too great a hurry to satisfy this curiosity. Put the problems before him and let him solve them himself. Let him know nothing because you have told him, but because he has learnt it for himself. Let him not be taught science, let him discover it. If ever you substitute authority for reason he will cease to reason; he will be a mere plaything of other people's thoughts.