The pursuit of mathematics is a divine madness of the human spirit.

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

It must be admitted that there is a degree of instability which is inconsistent with civilization. But, on the whole, the great ages have been unstable ages.

Education with inert ideas is not only useless; it is above all things harmful.

Seek simplicity, then distrust.

Seek simplicity, and distrust it.

The foundations of the world are to be found, not in the cognitive experience of conscious thought, but in the aesthetic experience of everyday life.