I decry supernaturalism in all its forms, and the most effective way to proceed will be to concentrate on the form most likely to be familiar to my readers--the form that impinges most threateningly on all our societies. Most of my readers will have been reared in one or another of today's three 'great' monotheistic religions (four if you count Mormonism), all of which trace themselves back to the mythological patriarch Abraham, and it will be convenient to keep this family of traditions in mind throughout the rest of this book.
This is as good a moment as any to forestall an inevitable retort to the book, one that would otherwise--as sure as night follows day--turn up in a review: 'The God that Dawkins doesn't believe in is a God that I don't believe in either. I don't believe in an old man in the sky with a long white beard.' That old man is an irrelevant distraction and his beard is as tedious as it is long. Indeed, the distraction is worse than irrelevant. Its very silliness is calculated to distract attention from the fact that what the speaker really believes is not a whole lot less silly. I know you don't believe in an old bearded man sitting on a cloud, so let's not waste any more time on that. I am not attacking any particular version of God or gods. I am attacking God, all gods, anything and everything supernatural, wherever and whenever they have been or will be invented. p. 36
Richard Dawkins, The God Delusion