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

Nobody has a right to speak more clearly than he thinks.

[In many circumstances,] the most important thing about a proposition is not that it be true, but that it be interesting.

Many a scientist has patiently designed experiments for the purpose of substantiating his belief that animal operations are motivated by no purposes. He has perhaps spent his spare time in writing articles to prove that human beings are as other animals so that 'purpose' is a category irrelevant for the explanation of their bodily activities, his own activities included. Scientists animated by the purpose of proving that they are purposeless constitute an interesting subject for study.

The worship of God is not a rule of safety - it is an adventure of the spirit, a flight after the unattainable.

Learning is often spoken of as if we are watching the open pages of all the books which we have ever read, and then, when occasion arises, we select the right page to read aloud to the universe.

Religion will not regain its old power until it can face change in the same spirit as does science.