I'll share with Holy some in your stead:
This is how I see it: trying to explain God in terms of an atheistic worldview is tough. A lot of God's present-day proof is mainly internal and personal. I know He exists because I've felt that bond. The Spirit in me and in others. You can argue physical proofs all the live long day and nobody is going to change their opinions, but I've found God keeps His promises to me as described in the Bible. Thereby I assume that if Biblical promises are fulfilled for me, two millennia after the fact, then Biblical promises could have been just as fulfilled for those who were involved in those stories.
Those who seek out physical proof are sort of missing the point, I think. While I understand the desire for that, it sort of defeats the purpose of the whole thing. Those who believe do just that- they believe in God and Jesus Christ without need of proof or fact- for whatever reasons they may have. From what I understand of it, God wants faith- hell, the religion's based around having faith, and if you had proof, well, there'd be no need for that, which defeats the purpose.
In my life, I've seen terrible things, and I've seen wonderful things. I've seen things that were stranger than fiction and to this day, the way some things have worked out still amaze me. While I'm sure a great many of these things can be chalked up to coincidence or be scientifically explained, I just have this feeling- every once in a while, where that connection that Daz mentions seems to manifest itself- and in that feeling, I find my faith. These are not things I can show or prove to others, there are no empirical facts- it's just faith, it's hope, and it's trust, which is what God wants (as far as I know, I make no claims to understanding the infinitely complex machinations of the almighty.)
Now, what I do say to most atheists I discuss this with, is that there's a great deal of things within the Bible I don't agree with, and the same goes for a great many things that have been wrongly done in the name of Jesus. That being said, I think we could all benefit from following the example of Jesus himself- that of love, forgiveness, outreach to those who need it, charity, humility... many a fine traits that these days seem lacking. Whether or not he was the son of God, I'll always believe he was a truly great person, and I'll strive to be more like him, in that regard.