Man can alter his life by altering his thinking.

We are spinning our own fates, good or evil, and never to be undone. Every smallest stroke of virtue or of vice leaves its never so little scar. ...Nothing we ever do is, in strict scientific literalness, wiped out.

There is a law in psychology that if you form a picture in your mind of what you would like to be, and you keep and hold that picture there long enough, you will soon become exactly as you have been thinking.

We don't laugh because we're happy - we're happy because we laugh.

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

How many of us persist in a precipitate course which, but for a moment of heedlessness we might never have entered upon, simply because we hate to change our minds.

It seems the natural thing for us to listen whilst the Europeans talk.