Take away paradox from the thinker and you have a professor.

There is nothing with which every man is so afraid as getting to know how enormously much he is capable of doing and becoming.

Boredom is the root of all evil - the despairing refusal to be oneself.

Listen to the cry of a woman in labor at the hour of giving birth - look at the dying man's struggle at his last extremity, and then tell me whether something that begins and ends thus could be intended for enjoyment.

To be a teacher does not mean simply to affirm that such a thing is so, or to deliver a lecture, etc.

All essential knowledge relates to existence, or only such knowledge as has an essential relationship to existence is essential knowledge.

God creates out of nothing. Wonderful you say. Yes, to be sure, but he does what is still more wonderful: he makes saints out of sinners.