“A retaliator behaves like a hawk when he is attacked by a hawk, and like a dove when he meets a dove. When he meets another retaliator he plays like a dove. A retaliator is a conditional strategist. His behaviour depends on the behaviour of his opponent.”

“In the world of the extended phenotype, ask not how an animal's behaviour benefits its genes; ask instead whose genes it is benefiting.”

“Bush and bin Laden are really on the same side: the side of faith and violence against the side of reason and discussion. Both have implacable faith that they are right and the other is evil. Each believes that when he dies he is going to heaven. Each believes that if he could kill the other, his path to paradise in the next world would be even swifter. The delusional "next world" is welcome to both of them. This world would be a much better place without either of them. ”

“You can make some inferences about a man's character if you know something about the conditions in which he has survived and prospered.”

“God likes to have his free lunch and be it too.”

“When I am dying, I should like my life taken out under general anaesthetic, exactly as if it were a diseased appendix.”

“Jesus was not content to derive his ethics from the scriptures of his upbringing. He explicitly departed from them. [...] Since a principal thesis of this chapter is that we do not, and should not, derive our morals from scripture, Jesus has to be honoured as a model for that very thesis.”