• That's one small step for man, one giant leap for mankind.

• It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn't feel like a giant. I felt very, very small.

• I believe that every human has a finite number of heart-beats. I don't intend to waste any of mine running around doing exercises.