If we knew what it was we were doing, it would not be called... - Albert Einstein

"An empty stomach is not a good political adviser."

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

"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."

"Anyone who has never made a mistake has never tried anything new."

"If at first the idea is not absurd, then there is no hope for it."