Evidence is great. I love to find believable evidence to back up the Biblical account, but such findings would please me whether I believed or not. As for my belief, I don't need evidence for that and I actually doubt the veracity of such evidence when someone tries to pawn it off.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.