"If we judge our lives by what we know or by what we say, we can easily deceive ourselves into thinking that we are something we are not; it is wiser to evaluate ourselves by the amount of truth we actually live. This is very humbling."

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There's a huge amount of pressure on every astronaut, because when you get right down to it, the experiments that are conducted on a space flight, or the satellites that are carried up, the work that's to be done, is important and expensive work, and you are up there for a week or two on a Space Shuttle flight. The country has invested a lot of money in you and your training, and the Space Shuttle and everything that's in it, and you have to do things correctly. You can't make a mistake during that week or two that you're in space.

— Sally Ride