Wisdom is not to be obtained from textbooks, but must be coined out of human experience in the flame of life.

Liberalism is an attitude rather than a set of dogmas - an attitude that insists upon questioning all plausible and self-evident propositions, seeking not to reject them but to find out what evidence there is to support them rather than their possible alternatives.

Let philosophy resolutely aim to be as scientific as possible, but let her not forget her strong kinship with literature.

A creative element is surely present in all great systems, and it does not seem possible that all sympathy or fundamental attitudes of will can be entirely eliminated from any human philosophy.

By no amount of reasoning can we altogether eliminate all contingency from our world. Moreover, pure speculation alone will not enable us to get a determinate picture of the existing world. We must eliminate some of the conflicting possibilities, and this can be brought about only by experiment and observation.

The picture which the philosopher draws of the world is surely not one in which every stroke is necessitated by pure logic.

If a philosophic theory is once ruled out of court, no one can tell when it will appear again.