"Houston, we've had a problem here."

"There are people who make things happen, there are people who watch things happen, and there are people who wonder what happened. To be successful, you need to be a person who makes things happen."

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

"The moon is essentially gray, no color. It looks like plaster of Paris, like dirty beach sand with lots of footprints in it."