Ambition and suspicion always go together.

Every man has his moral backside which he refrains from showing unless he has to and keeps covered as long as possible with the trousers of decorum.

What a blessing it would be if we could open and shut our ears...as easily as we open and shut our eyes.

What we have to discover for ourselves leaves behind in our mind a pathway that can be used on another occasion.

Whenever he composes a critical review, I have been told, he gets an enormous erection.

I have often noticed that when people come to understand a mathematical proposition in some other way than that of the ordinary demonstration, they promptly say, "Oh, I see. That's how it must be." This is a sign that they explain it to themselves from within their own system.

What you have been obliged to discover by yourself leaves a path in your mind which you can use again when the need arises.