"The universe is a great place to be, and I'm glad to be a part of it. But it's also a very dangerous place, and we need to be careful."

"I have spent my life traveling across the universe, inside my mind."

"Life would be tragic if it weren't funny."

"We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special."

"We are all time-travelers, heading into the future at the rate of one second per second."