One hears of the mechanical equivalent of heat. What we now need to discover in the social realm is the moral equivalent of war: something heroic that will speak to men as universally as war does, and yet will be as compatible with their spiritual selves as war has proved itself to be incompatible.

I wished by treating Psychology like a natural science, to help her become one.

Faith means belief in something concerning which doubt is still theoretically possible ... faith is the readiness to act in a cause the prosperous issue of which is not certified to us in advance.

Deepest principle of human nature is to be appreciated.

The ultimate test of what a truth means is the conduct it dictates or inspires.

The desire to gain wealth and the fear to lose it are our chief breeders of cowardice and propagators of corruption.

Between what a man calls me and what he simply calls mine the line is difficult to draw. We feel and act about certain things that are ours very much as we feel and act about ourselves.