Everything beautiful has a mark of eternity.

It is impossible that the whole of truth should not be present at every time and every place, available for anyone who desires it.

On reaching a certain degree of pain we lose the world.

Man alone can enslave man.

Compassion directed toward oneself is true humility.

The human soul has need of security and also of risk. The fear of violence or of hunger or of any other extreme evil is a sickness of the soul. The boredom produced by a complete absence of risk is also a sickness of the soul.

The authentic and pure values, truth, beauty, and goodness, in the activity of a human being are the result of one and the same act, a certain application of the full attention to the object. Teaching should have no aim but to prepare, by training the attention, for the possibility of such an act. All the other advantages of instruction are without interest.