I take the view, and always have, that if you cannot say what you are going to say in twenty minutes you ought to go away and write a book about it.

There are two kinds of people, those who finish what they start and so on.

If Beethoven had been killed in a plane crash at the age of 22, it would have changed the history of music... and of aviation.

Personally I rather look forward to a computer program winning the world [chess] championship. Humanity needs a lesson in humility.

Too many have dispensed with generosity in order to practice charity.

"We are survival machines - robot vehicles blindly programmed to preserve the selfish molecules known as genes.

You can never get the smell of smoke out. Like the smell of failure in life.

When I was one-and-twenty,<br> I heard a wise man say,<br> Give pounds and crowns and guineas,<br> But not your heart away."<br> <br> Give pearls away and rubies,<br> But keep your fancy free."<br> But I was one-and-twenty,<br> No use to talk to me.

The ability to quote is a serviceable substitute for wit.

The history of science is everywhere speculative. It is a marvelous hiatory. It makes you proud to be a human being.