Wanting proof is good. Unfortunately, they call it faith for a reason. You're supposed to just believe without any evidence to support it, though it is very difficult for a skeptical, reasonable mind to do that.
Prove he isn't. Faith is believing without proof.
Better to have the courage to face life and it's possibilities including death than to enslave your mind to a lie.
Peyote. Lots and lots of peyote.
Ever heard of Faith?
read St. Augustine. I wouldnt consider it proof but there are some great arguments for it