Act the part and you will become the part.

Keep the faculty of effort alive in you by a little gratuitous exercise every day.

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.

I originally studied medicine in order to be a physiologist, but I drifted into psychology and philosophy from a sort of fatality. I never had any philosophic instruction, the first lecture on psychology I ever heard being the first I ever gave.

The old question of whether there is design is idle. The real question is what is the world, whether or not it have a designer--and that can be revealed only by the study of all nature's particulars.

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

In any project the important factor is your belief. Without belief, there can be no successful outcome.