There is economics in biology, nothing is free, everything has to be paid for, there are costs as well as benefits to everything in life, for example, there was never sufficient natural selection pressure to develop better eyes, individuals could earn other things like smiley smiles rather than waste energy & time on better eyes.

Theologians will protest that the story of Abraham sacrificing Issac should not be taken as literal fact. And the appropriate response is twofold: first, many, many people even to this day, do take the whole of their Scripture to be literal fact, and they have a great deal of political power over the rest of us, especially in the United States and in the Islamic world. Second, if not of literal fact, how should we take the story? As an alagory? Then an alagory for what? Surely, nothing praiseworthy. As a moral lesson? But what kind of morals could one derive from this appalling story?

Unfortunately, however much we may deplore something, it does not stop being true.

They are in you and me; they created us, body and mind; and their preservation is the ultimate rationale for our existence. They have come a long way, those replicators. Now they go by the name of genes, and we are their survival machines.

As my colleague, the physical chemist Peter Atkins, puts it, we must be equally agnostic about the theory that there is a teapot in orbrit around the planet Pluto. We can't disprove it. But that doesn't mean the theory that there is a teapot is on level terms with the theory that there isn't.

The hypothesis of God offers no worthwhile explanation for anything, for it simply postulates what we are trying to explain.

Faith is powerful enough to immunize people against all appeals to pity, to forgiveness, to decent human feelings. It even immunizes them against fear, if they honestly believe that a martyr's death will send them straight to heaven.