What is a scientist after all? It is a curious man looking through a keyhole, the keyhole of nature, trying to know what's going on.

If we were logical, the future would be bleak indeed. But we are more than logical. We are human beings, and we have faith, and we have hope, and we can work.

Man, of all the animals, is probably the only one to regard himself as a great delicacy.

We must plant the sea and herd its animals . . . using the sea as farmers instead of hunters. That is what civilization is all about -- farming replacing hunting.

To yackety-yak about the past is for me time lost. Every morning I wake up saying, 'I'm still alive -- a miracle.' And so I keep on pushing.