Nature has a great simplicity and therefore a great beauty.

A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

I learned from her that every woman is worried about her looks, no matter how beautiful she is.

Physics is to mathematics what sex is to masturbation.

We never are definitely right, we can only be sure we are wrong.

The "paradox" is only a conflict between reality and your feeling of what reality "ought to be."

If a guy tells me the probability of failure is 1 in 100,000, I know he's full of crap.