The Universe is under no obligation to make sense to you.

Perhaps we’ve never been visited by aliens because they have looked upon earth and decided there’s no sign of intelligent life.

Typically, when you look for role models, you want someone who has your interests and came from the same background. Well, look how restricting that is. What people should do is take role models a la carte. If there's someone whose character you appreciated, you respect that trait.

NASA was invented as a response to Cold War steps. There are those who presumed that we went to the moon because we're explorers. We went to the moon because we were at war with the Soviet Union. And so when it became clear that they (Soviet Union) were not going to the moon, we're done with the moon.

If you're scientifically literate, the world looks very different to you, and that understanding empowers you.

When scientifically investigating the natural world, the only thing worse than a blind believer is a seeing denier.

Private enterprise can never lead a space frontier. It's not possible because a space frontier is expensive, it has unknown risks and it has unquantified risks.