The world is the closed door. It is a barrier. And at the same time it is the way through.

We have to try to cure our faults by attention and not by will.

Of two men who have no experience of God, he who denies him is perhaps nearer to him than the other.

Academic work is one of those fields which contain a pearl so precious that it is worth while to sell all our possessions, keeping nothing for ourselves, in order to be able to acquire it.

Man alone can enslave man.

I think that it is useless to fight directly against natural weaknesses. One has to force oneself to act as though one did not have them in circumstances where a duty makes it imperative; and in the ordinary course of life one has to know these weaknesses, prudently take them into account, and strive to turn them to good purpose; for they are all capable of being put to some good purpose.

Attention is the rarest and purest form of generosity.