If Jesus could see the entirety of history, then he could see whether he is the first "Jesus Christ". Given that the extra Christs are all explained by delusional patients copying the first Christ, this would be some sort of evidence (to himself) whether he is the real one.
Counterpoint: as Satan explains, it's all a hallucination anyway.
Yvain isn't a big enough self-promoter to link to this, but I liked it a lot and I think you will too.
"The Last Temptation of Christ"