A Roman Catholic priest and a rabbi sit down together in a bar and begin discussing their respective vocations. The rabbi asks the priest about his opportunities for advancement within the church hierarchy. The priest replies that although he currently serves a single small parish, he could someday become the archbishop of a major metropolitan area. "Is that it?" asks the rabbi. The priest hesitates for a moment, and responds that while the chances are much more remote, he might one day be chosen to serve as a cardinal. Once again the rabbi asks, "Is that it?" The priest (who is probably becoming a little annoyed at this point) replies that he is at least eligible to be elected to the papacy, and thus become the head of the entire church and God's leading representative on earth. But much to his surprise, the rabbi asks yet again, "Is that it?" The priest sarcastically exclaims, "What? Do you think that I can actually become God?"
To which the rabbi responds, "Why not? One of our boys did it."