Be thankful for problems. If they were less difficult, someone with less ability might have your job.

We learned a lot about the Moon, but what we really learned was about the Earth. The fact that just from the distance of the Moon you can put your thumb up and you can hide the Earth behind your thumb. Everything that you've ever known, your loved ones, your business, the problems of the Earth itself-all behind your thumb. And how insignificant we really all are, but then how fortunate we are to have this body and to be able to enjoy loving here amongst the beauty of the Earth itself.

Err Houston, we've had a problem. [pause] We've had a main B bus undervolt.

When I circled the moon and looked back at Earth, my outlook on life and my viewpoint of Earth changed... Earth is a spaceship, just like Apollo - and just like Apollo, the crew must learn to live and work together. We must learn to manage the resources of this world with new imagination.

Be thankful for problems. If they were less difficult, someone with less ability might have your job.

Houston, we've had a problem here.

The Moon is essentially gray - no color - looks like plaster of paris - soft of gray sand.