"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."

"There's no law that says you have to like science to be a scientist. Some people just want to make money."

"If you're religious, and you have some sort of revelation that makes you think something is true, that's not science. That's belief."

"If you're religious, you already have a book of answers. The problem is, it's not a book of questions."

"The universe is far more interesting than any human-made myth."