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.

Human intelligence was more trouble than it was worth. It was more destructive than creative, more confusing than revealing, more discouraging than satisfying, more spiteful than charitable.

The notion that the natural world obeys its own rules and doesn't give a damn about your expectations comes as a massive shock. But the natural world is not so malleable. On the contrary, it will demand that you adapt to it - and if you don't, you die.

The doctor is not a miracle worker who can magically save us but, rather, an expert adviser who can assist us in our own recovery.

At the edge of chaos, unexpected outcomes occur. The risk to survival is severe.

...scientific power is like inherited wealth: attained without discipline. You read what others have done, and you take the next step. You can do it very young...there is no mastery, old scientists are ignored. There is no humility before nature...Its a form of inherited wealth. And you know what assholes congenitally rich people are.

Theories are just fantasies. And they change.