There is no difference between someone who eats too little and sees Heaven and someone who drinks too much and sees snakes.

One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.

Vanity is a motive of immense potency.

In science the successors stand upon the shoulders of their predecessors; where one man of supreme genius has invented a method, a thousand lesser men can apply it. ... In art nothing worth doing can be done without genius; in science even a very moderate capacity can contribute to a supreme achievement.

The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.

The reformative effect of punishment is a belief that dies hard, chiefly I think, because it is so satisfying to our sadistic impulses.

Look at me. Look at me is one of the fundamental desires of human heart.