When you're in outer space, how do you stay motivated, when it's so lonely and pretty stressful too?

It's actually all about the mission. It sounds a little stereotypical to say that but the work is so important and there just isn't a do over. I mean, if you mess something up and you have to do it over, often you can do that. But there's just - you could be doing other really useful things. In the case of something like capturing a 16-ton supply ship with the robotic arm, there really isn't a do over and I find it's the mission but it's also kind of just saying, you know, "I have done everything I can to be ready." If you've done your best. No one can ask anything more than that. So you're ready.

Do you apply that to your work life now here on the ground?

I do that, you know, but often I'm like, I will say an example of TED here, I was a little worried about giving a talk and forgetting, or not saying everything I meant to say, and that was all wrapped up in me and then I went to the first night of talks here and I realized that everyone's here because they have something to say and people are here to listen. And that was the important mission, as opposed to me worrying about how I felt about it, and that got me through.

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