I'm a pessimist. But I'm a pessimist with a sense of responsibility.

But you know, I'm the negative-Nancy, curmudgeon, glass-half-empty-with-a-leak-in-it guy - which is basically the fuel that fires me up anyway. Without that, we wouldn't have me.

A pessimist is a well-informed optimist.

A pessimist is a man who thinks everybody is as nasty as himself, and hates them for it.

Mind precedes all mental states. Mind is their chief; they are all mind-wrought. If with a pure mind a person speaks or acts happiness follows him like his never-departing shadow.

In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.