Art flourishes where there is a sense of adventure.

Art flourishes where there is a sense of adventure, a sense of nothing having been done before, of complete freedom to experiment.

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.

The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.

The true method of discovery is like the flight of an aeroplane. It starts from the ground of particular observation; it makes a flight in the thin air of imaginative generalization; and it again lands for renewed observation rendered acute by rational interpretation.

It is impossible to meditate on time and the mystery of nature without an overwhelming emotion at the limitations of human intelligence.

The purpose of education is not to fill a vessel but to kindle a flame.