Exploration is really the essence of the human spirit.

The view of the Earth from the Moon fascinated me -- a small disk, 240,000 miles away. . . . Raging nationalistic interests, famines, wars, pestilence, don't show from that distance.

[The Moon] was a sobering sight, but it didn't have the impact on me, at least, as the view of the Earth did.

Exploration is really the essence of the human spirit.

I think the one overwhelming emotion that we had was when we saw the Earth rising in the distance over the lunar landscape - it makes us realize that we all do exist on one small globe. For from 230,000 miles away, it really is a small planet.

We have to earn our Wings every day.

Astronauts: space activists.