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.

The difference between ancients and moderns is that the ancients asked what have we experienced, and moderns asked what can we experience.

Ninety percent of our lives is governed by emotion.

It requires a very unusual mind to undertake the analysis of the obvious.

To come very near to a true theory, and to grasp its precise application, are two different things, as the history of science teaches us. Everything of importance has been said before by someone who did not discover it.

The only use of knowledge of the past is to equip us for the present.

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