Skeptic: "Doesn't it bother you that there's no real evidence that God even exists?"
Christian: "Not at all. If God gave us proof, there'd be no room left for faith!"
That line's always a conversation-stopper, for some reason. I'd like to see the conversation continue, though, as the claim raises an obvious question: what's so great about "faith"? I'd have thought it a good thing to have one's beliefs properly confirmed. To have sufficient grounds for your beliefs seems like an improvement over having insufficient grounds, right? So why does the TV-Christian imply that such a transition would be a bad thing?
I guess the idea is that uncertainty enables trust to be expressed, tested, and confirmed. If you're accused of some misdeed, immediate proof of innocence would rob you of the chance to see who really trusts you. But there are two major flaws with this analogy:
(1) The need for virtue is contingent on imperfect conditions. Hume points out that generosity would be unnecessary in conditions of abundance. Likewise, trust is pointless for one (like God) who can always dispel uncertainty and reveal the truth. If virtue is an instrument for good, it would seem awfully backward to value the instrument more than the perfection it aims to attain!
(2) The analogy is a non-starter in any case. The question of God's existence is logically prior to whether he's trustworthy. We're not assessing God himself, but rather an abstract proposition - the question whether there's anyone there for us to assess. (This conflation also underlies the silly claim that "atheists hate God.") Granted, there's a loose sense in which one can 'trust' that a proposition is true -- let's call this "de dicto trust" -- but that's a completely different matter from trusting in a person, de re.
So even if we grant that de re trust in God's goodness has intrinsic value, it still doesn't follow that there's anything good about de dicto faith in the unsupported proposition that God exists. Theists should much prefer to have solid proof supersede their blind (de dicto) "faith".