The danger is not lest the soul should doubt whether there is any bread, but lest, by a lie, it should persuade itself that it is not hungry.

I can, therefore I am.

Contradiction itself, far from always being a criterion of error, is sometimes a sign of truth.

We must prefer real hell to an imaginary paradise.

One does not play Bach without having done scales. But neither does one play a scale merely for the sake of the scale.

We are like horses who hurt themselves as soon as they pull on their bits - and we bow our heads. We even lose consciousness of the situation, we just submit. Any re-awakening of thought is then painful.

It is only the impossible that is possible for God. He has given over the possible to the mechanics of matter and the autonomy of his creatures.