The thing that I have done throughout my life is to do the best job that I can and to be me.

Never limit yourself because of others' limited imagination; never limit others because of your own limited imagination.

When God made the color purple, God was just showing off.

As an astronaut, you have a very defined set of tasks to do. Those tasks may require you to work 60, 70 or 80 hours a week.

The arts and sciences are avatars of human creativity.

Once I got into space, I was feeling very comfortable in the universe. I felt like I had a right to be anywhere in this universe, that I belonged here as much as any speck of stardust, any comet, any planet.

Never be limited by other people's limited imaginations.