"The other thing we've learned about intelligence is that the most intelligent entities on the planet can also be the most deluded. Human beings are by far, so far, the most intelligent beings on the planet and the most deluded. We believe ridiculous things that no chimpanzee or dog or pig would ever dream of believing.., that if you... kill other people.., after you die, you go to heaven... because of the wonderful thing you did: you killed... these other members of your species."