The future belongs to those who can rise above the confines of the earth.

People make the mistake of talking about 'natural laws.' There are no natural laws. There are only temporary habits of nature.

Philosophy is the self-correction by consciousness of its own initial excess of subjectivity.

Dogmatism is the anti-Christ of learning.

By relieving the brain of all unnecessary work, a good notation sets it free to concentrate on more advanced problems, and in effect increases the mental power of the race.

Everyone is a philosopher. Not everyone is good at it.

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.