Thinking is the hardest work there is, which is probably the reason why so few engage in it.

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.

It is a sin not to know why you are sinning. Pointless sin must be avoided.

An integral part of any relationship is knowing that you could be killed in your sleep at any time.

The object of mathematics is the honor of the human spirit.