The QOTD, on Christian apologetics:

Still (comes the reply), can’t we discover for ourselves, without any special divine aid or assistance, that the Bible (the New Testament, say) is in fact ‘from God’; divinely inspired in such a way that God speaks to us in it and through it, and hence wholly reliable? Can’t we come to see this in the same way that we can learn that Herodotus and Xenophon are reasonably reliable reporters of what they hear and see? And once we see that, couldn’t we then infer that the Bible’s central message of incarnation and atonement is true? Can’t we see and appreciate the historical case for the truth of the main lines of Christian belief without any special work of the Holy Spirit? ‘You must be born again’ all right - your affections, aims, and intentions must be re calibrated, redirected, reversed - and that requires special divine help. But given that recalibration, couldn’t you then see and appreciate the historical case for the truth of the main lines of Christianity without any special work of the Holy Spirit?

I don’t think so. Even discounting the effects of sin on our apprehension of the historical case, that case isn’t strong enough to produce warranted belief that the main lines of Christian teaching are true - at most, it could produce the warranted belief that the main lines of Christian teaching aren’t particularly improbable.”

– Alvin Plantinga, Warranted Christian Belief (available online for free, here), pg. 244-45.