Effort is the one strictly undervalued and original contribution we make to this world.

The minute a man ceases to grow, no matter what his years, that minute he begins to be old.

If you wish to upset the law that all crows are black, you mustn't seek to show that no crows are; it is enough if you prove one single crow to be white.

'Pure experience' is the name I gave to the immediate flux of life which furnishes the material to our later reflection with its conceptual categories.

No decision is, in itself, a decision.

Do every day or two something for no other reason than its difficulty.

If the grace of God miraculously operates, it probably operates through the subliminal door.