"Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution."

"Science without religion is lame, religion without science is blind."

"I have no special talents. I am only passionately curious."

"I want to go when I want. It is tasteless to prolong life artificially. I have done my share, it is time to go. I will do it elegantly."

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."