Faith is the great cop-out, the great excuse to evade the need to think.

Just because science can't in practice explain things like the love that motivates a poet to write a sonnet, that doesn't mean that religion can. It's a simple and logical fallacy to say, "If science can't do something therefore religion can.

The thing that defines a species is that all members have the same addressing system for their DNA.

If you are religious at all, it is overwhelmingly probable that your religion is that of your parents. If you were born in Arkansas and you think Christianity is true and Islam false (knowing full well that you would think the opposite if you had been born in Afghanistan), you are the victim of childhood indoctrination.

The take-home message is that we should blame religion itself, not religious extremism - as though that were some kind of terrible perversion of real, decent religion. Voltaire got it right long ago: 'Those who can make you believe absurdities can make you commit atrocities.' So did Bertrand Russell: 'Many people would sooner die than think. In fact they do.

I am passionate about truth and passionate about clarity, and I don't regard myself as particularly militant or aggressive. I simply wish to discuss what is true and to listen to evidence and put evidence forward to other people and have a sensible, sane, moderated argument.

There is enough information capacity in a single human cell to store the Encyclopedia Britannica, all 30 volumes of it, three or four times over.