“It’s hard to appreciate the Earth when you’re down right upon it because it’s so huge.
“It gives you in an instant, just at a position 240,000 miles away from it, (an idea of) how insignificant we are, how fragile we are, and how fortunate we are to have a body that will allow us to enjoy the sky and the trees and the water … It’s something that many people take for granted when they’re born and they grow up within the environment. But they don’t realize what they have. And I didn’t till I left it.”
-Jim Lovell, Apollo 8 and 13.