"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

The quantum theory of computation is the most profound discovery in the history of science.

You have to be able to admit when you're wrong and move on.