"The universe is a symphony of strings, and the mind is an instrument that can play them."

"I'm often asked, 'What is the meaning of life?' I don't know, but I think that the search for meaning is a good meaning to have."

"I'm not a guru. I'm just a guy who loves the universe."

"If you are a scientist, you are a scientist. You don't have to be a 'black scientist' or a 'woman scientist.'"

"The universe is not a problem to be solved. It's a mystery to be explored."