Anyone who has looked deeply into the world may guess how much wisdom lies in the superficiality of men. The instinct that preserves them teaches them to be flighty light, and false.

Be careful who you choose as your enemy because that's who you become most like.

Every virtue inclines to stupidity, every stupidity to virtue; "stupid to the point of sanctity," they say in Russia, - let us be careful lest out of pure honesty we eventually become saints and bores!

They're so cold, these scholars! May lightning strike their food so that their mouths learn how to eat fire!

Every step forward is made at the cost of mental and physical pain to someone.

He who does not desire much more from things than knowledge of them easily makes peace with his soul.

There are ages in which the rational man and the intuitive man stand side by side, the one in fear of intuition, the other with scorn for abstraction. The latter is just as irrational as the former is inartistic.