Mathematics alone make us feel the limits of our intelligence. For we can always suppose in the case of an experiment that it is inexplicable because we don't happen to have all the data. In mathematics we have all the data, brought together in the full light of demonstration, and yet we don't understand. We always come back to the contemplation of our human wretchedness. What force is in relation to our will, the impenetrable opacity of mathematics is in relation to our intelligence.

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.

Beauty always promises, but never gives anything.

Beauty is a fruit which we look at without trying to seize it.

The needs of a human being are sacred. Their satisfaction cannot be subordinated either to reasons of state, or to any consideration of money, nationality, race, or color, or to the moral or other value attributed to the human being in question, or to any consideration whatsoever.

The appetite for power, even for universal power, is only insane when there is no possibility of indulging it; a man who sees the possibility opening before him and does not try to grasp it, even at the risk of destroying himself and his country, is either

To be rooted is perhaps the most important and least recognized need of the human soul.