The joy of learning is as indispensable in study as breathing is in running. Where it is lacking there are no real students, but only poor caricatures of apprentices who, at the end of their apprenticeship, will not even have a trade.

Contradiction is the lever of transcendence.

Punishment is a vital need of the human soul.

The entire universe is nothing but a great metaphor.

One must always be ready to change sides with justice, that fugitive from the winning camp.

Man alone can enslave man.

Love: To feel with one's whole self the existence of another being.