Imagine that your friend Tom ran up to you and frantically blustered out, "Mike said that an angel revealed to him the date of the apocalypse - we have to leave the country and form a colony in the middle of the Pacific. It's our only hope!" You might dismiss the comment out of hand, for no particular reason other than that it sounds unlikely. But that's not a good reason to dismiss it. Let's say you go to question Mike, and you ask "Why the Pacific?" Mike confidently tells you that there's a mountain in the middle of the Pacific Ocean, and that if we all climb to the top of that mountain we'll be spared from the apocalypse (presumably a flood) and live. So you threaten to kill him, stabbing him through the shoulder once to show him you're serious. He still won't recant - he believes what he's saying is true. You still won't follow Mike because you've checked Google Maps and there is no mountain in the middle of the Pacific Ocean.
You go back to Tom and tell him everything. Tom looks at you kind of condescendingly and says, "______, you're too much of a literalist. I know Mike is wrong about the mountain in the middle of the Pacific, but I believe him on spiritual matters." Mike is dangerously wrong, and Tom is an idiot. Why? And what does this have to do with Liberal Christianity?
Plenty of Reasons to Believe the Bible
That said, there are plenty of reasons to believe in the Bible. Liberal Christians think that the Bible contradicts itself, but I'm addicted to reason and even I haven't found a contradiction that holds. Liberals think that the Bible doesn't fit with historical knowledge, but archaeological finds overturn that opinion every other year. The accepted dates for Biblical writings just keep getting earlier and earlier. The writers of the New Testament believed their message so much that they died for it. Not only that, but no one even contradicted their facts until hundreds of years later. I can't double check what the Bible says about the Trinity, or salvation, or angels and the apocalypse, but I can check what it says about other things. And if it fails to prove that it's trustworthy, if the writers fail to prove they were trustworthy, then you and I have no reason to be Christians. There is no such thing an intelligent, non-literalist, I-believe-the-Bible-only-on-spiritual-matters Liberal Christian faith. The only intelligent faith options are literalist, Bible-believing Christianity, or agnosticism.
Not Heaping Scorn On Liberal ChristiansMy hope? Not to heap scorn upon liberal believers, but to show them that their position doesn't work. I've been reading Richard Dawkins' The God Delusion, and all I keep thinking is, "Wow. That's a really good argument against non-literalist Christians." Dawkins is right. The kind of faith that some Christians -liberal Christians- hold to is no more believable than trusting in Wotan or the tooth fairy. If the Bible contains errors, contradicts itself, and isn't historically trustworthy, then it can't be trustworthy on spiritual matters either. Ditching the Bible and holding to the faith isn't really a well thought-out, intelligent option.