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

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.

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