Art is the proper task of life.

These small things - nutrition, place, climate, recreation, the whole casuistry of selfishness - are inconceivably more important than everything one has taken to be important so far.

Ten times must you laugh during the day, and be cheerful; otherwise your stomach, the father of affliction, will disturb you in the night.

How poisonous, how crafty, how bad, does every long war make one, which cannot be waged openly by means of force!

Intoxicating joy is it for the sufferer to look away from his suffering and forget himself. Intoxicating joy and self-forgetting, did the world once seem to me.

All philosophy is a form of confession.

Mathematics is merely the means to a general and ultimate knowledge of man.