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.

Evolution is a very, very important idea. It is the explanation for all of life - a stunningly simple, yet powerful explanation. If you think about it, before Darwin, we hadn't the foggiest idea of how we came into being. Now we do. It's still such an exciting idea that it is well worth everybody understanding it.

Words are our servants, not our masters. For different purposes, we find it convenient to use words in different senses.

You can't statistically explain improbable things like living creatures by saying that they must have been designed because you're still left to explain the designer, who must be, if anything, an even more statistically improbable and elegant thing.

I think we have got to start again and go right back to first principles. The argument I shall advance, surprising as it may seem coming from the author of the earlier chapters, is that, for an understanding of the evolution of modern man, we must begin by throwing out the gene as the sole basis of our ideas on evolution. If there is only one Creator who made the tiger and the lamb, the cheetah and the gazelle, what is He playing at? Is he a sadist who enjoys spectator blood sports? ... Is he manuvering to maximize David Attenborough's television ratings?

Indeed, organizing atheists has been compared to herding cats, because they tend to think independently and will not conform to authority. But a good first step would be to build up a critical mass of those willing to 'come out,' thereby encouraging others to do so. Even if they can't be herded, cats in sufficient numbers can make a lot of noise and they cannot be ignored.

I like to think 'The God Delusion' is a humorous book. I think, actually, it's full of laughs. And people who describe it as a polarizing book or as an aggressive book, it's just that very often they haven't read it.