I can remember walking on the moon.

Frequently on the lunar surface I said to myself, 'This is the Moon, that is the Earth. I'm really here, I'm really here!'

Eventually there are going to be cities in space.

I found I have to stay painting.

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.

But I found that being an artist and doing accurate work is very difficult.

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.