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.
The important achievement of Apollo was demonstrating that humanity is not forever chained to this planet, and our visions go rather further than that, and our opportunities are unlimited.
The single thing which makes any man happiest is the realization that he has worked up to the limits of his ability, his capacity. It’s all the better, of course, if this work has made a contribution to knowledge, or toward moving the human race a little farther forward.
