"I often wonder if there are aliens out there who are watching us, and they're just shaking their heads, like, 'Look at these primitive beings, still fighting over land and resources.'"

"If you're not amazed by the universe, you're not paying attention."

"I'm not afraid of questions. I'm afraid of people who don't ask questions."

"The universe is a magnificent place, and it's all ours to discover."

"I find that if you have a goal, that you're going to work toward it. And if you don't have a goal, you're going to wander around aimlessly."