Test pilots have a litmus test for evaluating problems. When something goes wrong, they ask, "Is this thing still flying?" If the answer is yes, then there's no immediate danger, no need to overreact.

As the centuries unfold, millions of artists will live on the moon and paint the moon and Mars as we go out into the universe.

One of the great things about the universe is that it's fair.

But I'm the only one who can paint the moon, because I'm the only one who knows whether that's right or not.

We knew it was going to be difficult to get to the moon. We didn't know how difficult.

Eventually there are going to be cities in space.

I found I have to stay painting.