...and then scroll down to where it says "Where does the idea of God come from?" what follows is an absolutely classic paragraph of Douglas Adams's genius. Very hard to disprove, too.
There's been a lot of debate recently regarding the so-called "God spot" within the brain that suggests humans are hardwired to believe in god and that god is, therefore, simply a creation of the mind. An anthropologist (whose name I forget) recently theorised on TV, that at some point in mankind's evolution, humans become aware of their insignificance in the universe and would have fallen into a world-wide despondency had not they "invented" a purpose for man's existence. Those humans most receptive to this idea proved better able to survive in, what is ultimately, a godless world. Modern humans still retain this need for a meaning in their psyche. (A depressing answer, I admit, but one of the best I've encountered so far!)
I wonder where P Greenwood gets his belief from. Even the Bible doesn't say that God has existed for ever. Will exist for ever, that's a different matter.
This question seems to be a variation on the question often asked by children: "Who made God?" If God had to "come from" anywhere, in other words, if God had a beginning, then he wouldn't be God, at least he wouldn't be God in the sense in which He is described in the Bible - eternal, almighty, the Creator of all things. And if God had to be "made", then His maker, and not He Himself, would be the supreme Being.
Regards,
David