It's hard to decide who's truly brilliant; it's easier to see who's driven, which in the long run may be more important.

The past history of human belief is a cautionary tale. We have killed thousands of our fellow human beings because we believed they had signed a contract with the devil, and had become witches. We still kill more than a thousand people each year for witchcraft. In my view, there is only one hope for humankind to emerge from what Carl Sagan called "the demon-haunted world" of our past. That hope is science.

Cut off from direct experience, cut off from our own feelings and sometimes our own sensations, we are only too ready to adopt a viewpoint or perspective that is handed to us, and is not our own.

Finally, I would remind you to notice where the claim of consensus is invoked. Consensus is invoked only in situations where the science is not solid enough. Nobody says the consensus of scientists agrees that E=mc2. Nobody says the consensus is that the sun is 93 million miles away. It would never occur to anyone to speak that way.

Malcolm: A karate master does not kill people with his bare hands. He does not lose his temper and kill his wife. The person who kills is the person who has no discipline, no restraint, and who has purchased his power in the form of a Saturday night special. And that is why you think that to build a place like this is simple. Hammond: It was simple. Malcolm: Then why did it go wrong?

They don't have intelligence. They have what I call 'thintelligence.' They see the immediate situation. They think narrowly and they call it 'being focused.' They don't see the surround. They don't see the consequences.

I hadn't traveled with the intention of learning about anything except myself. And the real point of all this travel was not what I had come to believe or disbelieve about the wider world, but what I had learned about myself.