In Luke 16:19-31 Jesus tells the story of the rich man and Lazarus (I don't regard this as a parable, others do, and whether or not it is makes no difference to what is being taught.). At the end the rich man wants to go back and warn his brothers, and Abraham concludes the story in verse 31 by saying, "If they do not listen to Moses and the Prophets, they will not be convinced even if someone rises from the dead." What this final statement is telling us this that the Bible is all the evidence needed to believe. The other side of this that if someone will not believe the Bible, no other evidence is going to convince them.
I recently found confirmation of this from the, recently deceased, atheist spokesperson Christopher Hitchens. In a clip on YouTube ( here is the link http://www.youtube.com/watch?v=TmxAGhC-gLU&feature=related ) In it he clearly states that even if all the miracles in the Attributed to Jesus are true (including the Virgin Birth and Resurrection) it's still no proof that there is a God. His exact words are, "I'll give you all the miracles and you'll still be where you are now, holding an empty sack." He is effectively saying that the Bible is not evidence for God, neither is someone raising from the dead. This demonstrates the truth of Abraham's words in Luke 16:31.
Christopher Hitchens has pass away, so I'll never know if I'm right, but I believe that even if he had a personal encounter with the living Christ, like Saul on the road to Damascus, he still would not have believed. Actually, if I'd had the chance to ask Christopher, I think he would agree.
One cannot believe in the God of the Bible without first believing the Bible. When it come to evidence of God, the Bible is the only evidence that really matters.