Muhammad is more human, more self-doubting, even self-tortured at times. His story is full of adventure, intrigue, betrayal.

You have to think of your brand as a kind of myth. A myth is a compelling story that is archetypal, if you know the teachings of Carl Jung. It has to have emotional content and all the themes of a great story: mystery, magic, adventure, intrigue, conflicts, contradiction, paradox.

I like Muhammad a lot, because he's like us more than anybody else. Jesus is just so exalted, and Buddha is just so exalted, it's almost beyond our reach.

Although we take it for granted, sanitation is a physical measure that has probably done more to increase human life span than any kind of drug or surgery.

From a scientist's perspective, to understand everything that you need to know about human beings, you only have to tinker with all the mechanical parts of genes and the brain until there are no more secrets left.

Human beings place their desires ahead of the collective good.