No one who achieves success does so without acknowledging the help of others. The wise and confident acknowledge this help with gratitude.

The whole of mathematics consists in the organization of a series of aids to the imagination in the process of reasoning.

Religion is what the individual does with his own solitariness.

The worst that happened to men of science was that Galileo suffered an honorable detention and a mild reproof, before dying peacefully in his bed.

Identification of rhythm as the casual counterpart of life; wherever there is some life, only perceptible to us when the analogies are sufficiently close.

The ultimate metaphysical ground is the creative advance into novelty.

In all education the main cause of failure is staleness.