You make a great, very great mistake, if you think that psychology, being the science of the mind's laws, is something from which you can deduce definite programmes and schemes and methods of instruction for immediate schoolroom use.

The greatest discovery of the 20th Century is that our attitude of mind determines our quality of life, not circumstances.

Our colleges ought to have lit up in us a lasting relish for a better kind of man, a loss of appetite for mediocrities.

The word 'cause' is an altar to an unknown god.

When two minds of a high order, interested in kindred subjects, come together, their conversation is chiefly remarkable for the summariness of its allusions and the rapidity of its transitions. Before one of them is half through a sentence the other knows his meaning and replies. ... His mental lungs breathe more deeply, in an atmosphere more broad and vast.

Evil is a disease; and worry over disease is itself an additional form of disease, which only adds to the original complaint.

[T]here is very little difference between one person and another, but what little difference ther eis, is very important.