I don’t know what you could say about a day in which you have seen four beautiful sunsets.
- John Glenn

Please, dear God, don’t let me fuck up.
- Alan B. Shepard

I believe every human has a finite number of heartbeats. I don’t intend to waste any of mine.
- Neil Armstrong

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

Reach for the stars.
- Christa McAuliffe