The true test of leadership is not what you do when you're being watched, but what you do when you're alone.

Not for the sake of our health, though it's often presented that way, but because it's an escape from the human anthill. It's an escape from our own competition, and our own dramas. And that's why ween joy looking at glaciers and oceans, and contemplating the Earth from outside its perimeters, etc. We like to feel in contact with something that is non-human, and that is so deeply important to us.

The most alluring thing a woman can have is confidence.

Great engineering is invisible—it just works seamlessly.