"The universe is a very strange place, and I'm still trying to figure it out."

"I believe that the universe is infinite, and that there are an infinite number of universes."

"The human race is a single, genetic family."

"In the proof stage, I nearly cut that last sentence of the book. Had I done so, the sales might have been halved."

"The only advantage of my disability is that I do not get put on a lot of boring committees."