"I put my thumb up and I could hide the whole Earth behind my thumb. I felt like a little tiny speck in this vast universe."

"I don't feel like I'm a hero. I'm just a guy who went to the Moon."

"The greatest value of space exploration is not in the discoveries we make, but in the discoveries we make about ourselves."

"The single most important factor in our success was that we were a team."

"Mystery creates wonder and wonder is the basis of man's desire to understand."