There are two lives, the natural and the spiritual, and we must lose the one before we can participate in the other.

The world is all the richer for having a devil in it, so long as we keep our foot upon his neck.

A great idea goes through three stages on its way to acceptance: 1) it is dismissed as nonsense, 2) it is acknowledged as true, but insignificant, 3) finally, it is seen to be important, but not really anything new.

At bottom, the whole concern of religion is with the manner of our acceptance of the universe.

To improve the golden moment of opportunity, and catch the good that is within our reach, is the great art of life.

The greatest enemy of any one of our truths may be the rest of our truths.

Man can change his life simply by changing his attitude.