"Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly."
"Black holes are where God divided by zero."
"The ideals which have always shone before me and filled me with joy are goodness, beauty, and truth."
"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."
"Everything must be made as simple as possible. But not simpler."
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."