The greatest discovery of the 20th Century is that our attitude of mind determines our quality of life, not circumstances.

In modern eyes, precious though wars may be they must not be waged solely for the sake of the ideal harvest. Only when forced upon one, is a war now thought permissible.

The 'I think' which Kant said must be able to accompany all my objects, is the 'I breathe' which actually does accompany them.

True ideas lead us into useful verbal and conceptual quarters as well as directly up to useful sensible termini. They lead to consistency, stability and flowing human intercourse.

Truth happens to an idea

If there is aught of good in the style, it is the result of ceaseless toil in rewriting. Everything comes out wrong with me at first; but when once objectified in a crude shape, I can torture and poke and scrape and pat it till it offends me no more.

O my Bergson, you are a magician, and your book is a marvel, a real wonder in the history of philosophy . . . In finishing it I found . . . such a flavor of persistent euphony, as of a rich river that never foamed or ran thin, but steadily and firmly proceeded with its banks full to the brim.