"I would be a lot more comfortable if I could be assured that the people who say 'I'm a Christian' actually lived by the tenets of Christianity."

"I'm a big believer in the power of curiosity. It's what drives us to explore, to discover, to learn."

"The universe is a vast and mysterious place, and we are just beginning to understand it."

"I'm not saying I'm smarter than anyone. I'm just saying I've read more books."

"If you're ever feeling small, just remember that you're made of stardust, and you're part of something much bigger than yourself."