Black holes are where God divided by zero.

Student: Dr. Einstein, Aren't these the same questions as last year's [physics] final exam?

Dr. Einstein: Yes; But this year the answers are different.

Even on the most solemn occasions I got away without wearing socks and hid that lack of civilization in high boots

Never memorize something that you can look up.

It is harder to crack prejudice than an atom.

I prefer to make up my own quotes and attribute them to very smart people, so that I can use them to win arguments