Sam Harris writes in his book Letter to a Christian Nation,
We agree, for instance, that if one of us is right, the other is wrong. The Bible is either the word of God, or it isn’t. Either Jesus offers humanity the one, true path to salvation (John 14:6), or he does not. We agree that to be a true Christian is to believe that all other faiths are mistaken, and profoundly so. If Christianity is correct, and I persist in my unbelief, I should expect to suffer the torments of hell. Worse still, I have persuaded others, and many close to me, to reject the very idea of God. They too will languish in “eternal fire” (Matthew 25:41). If the basic doctrine of Christianity is correct, I have misused my life in the worst conceivable way.
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I have written elsewhere about the problems I see with religious liberalism and religious moderation. Here, we need only observe that the issue is both simpler and more urgent than the liberals and moderates generally admit. Either the Bible is just an ordinary book, written by mortals, or it isn’t. Either Christ was divine, or he was not. If the Bible is an ordinary book, and Christ was an ordinary man, the history of Christian theology is the story of bookish men parsing a collective delusion. If the basic tenets of Christianity are true, then there are some very grim surprises in store for nonbelievers like myself. You understand this. At least half of the American population understands this. So let us be honest with ourselves: in the fullness of time, one side is really going to win this argument, and the other side is really going to lose.