We must be careful not to confuse data with the abstractions we use to analyse them.

The war-function has grasped us so far; but the constructive interests may some day seem no less imperative, and impose on the individual a hardly lighter burden.

Genius... means little more than the faculty of perceiving in an unhabitual way.

Man lives by habits indeed, but what he lives for is thrill and excitements. ... From time immemorial war has been ... the supremely thrilling excitement.

To be a real philosopher all that is necessary is to hate some one else's type of thinking.

Each of us is in fact what he is almost exclusively by virtue of his imitative-ness.

It is wrong always, everywhere, and for everyone, to believe anything upon insufficient evidence.