Even in the presence of others he was completely alone.

I don't make myself work. It's just the thing I want to do. To be completely alone in a room, to know that there'll be no interruptions and I've got eight hours is exactly what I want -- yeah, just paradise.

One geometry cannot be more true than another; it can only be more convenient. Geometry is not true, it is advantageous.

Boredom always precedes a period of great creativity.

For every fact there is an infinity of hypotheses.

It is a puzzling thing. The truth knocks on the door and you say, 'Go away, I'm looking for the truth,' and so it goes away. Puzzling.