Wheat and Chaff: "If truth exists, and God cannot lie, then for every question you can ask about God there is one correct answer. This is true if the question is phrased properly, and is not ambiguous of itself. But if you ask, Is there a God? There is only one correct answer to that question. If you ask, is God good? Again, there is only one correct answer. If you say that God is good, and that God is not good, then you've contradicted yourself, and you've accused God of lying. Therefore, there must be a whole collection of interrelated truths about God. All of these truths together are a system of truth."
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Great stuff on Matt's site. Go there often.