The best way to study Mars is with two hands, eyes and ears of a geologist, first at a moon orbiting Mars... and then on the surface.

A moral being is one who is capable of reflecting on his past actions and their motives - of approving of some and disapproving of others.

Early on, I was so impressed with Charles Dickens. I grew up in the South, in a little village in Arkansas, and the whites in my town were really mean, and rude. Dickens, I could tell, wouldn't be a man who would curse me out and talk to me rudely.

Occasionally I get fed up, going to visit a factory, when I am being shown around by the chairman, who clearly hasn't got a clue, and I try to get hold of the factory manager, but I can't because the chairman wants to make sure he's the one in all the photographs.

Initiative is doing the right thing without being told.