Most people live, whether physically, intellectually or morally, in a very restricted circle of their potential being.

The soul is stronger than its surroundings.

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 most peculiar social self which one is apt to have is in the mind of the person one is in love with.

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

The question of free will is insoluble on strictly psychological grounds.

You can be an artist without visual images, a reader without eyes, a mass of erudition with a bad elementary memory. In almost any subject your passion for the subject will save you. If you only care enough for a result, you will almost certainly attain it. If you wish to be rich, you will be rich; if you wish to be learned, you will be learned; if you wish to be good, you will be good. Only you must, then, really wish these things, and wish them with exclusiveness, and not wish at the same time a hundred other incompatible things just as strongly.