Religious job prospects

A Catholic priest and a Rabbi are talking about job prospects.
"Well," says the priest, "there's a good chance that I'll be the next bishop, maybe within the next couple of years."
"Bishop!" marvels the Rabbi, "very nice. And after that?"
"Oh, I don't know, I suppose it's possible I could become Archbishop, given luck and God's blessing."
"Very nice, very nice; and after Archbishop?"
"Ha! Well, you know, it's Cardinal after that, but it's really very unlikely. But in theory, I could become a Cardinal."
"Lovely!" enthuses the Rabbi, "the scarlet would suit your complexion. So what's after Cardinal?"
The priest smiles. "After Cardinal? Well, it's Pope. But I'm hardly likely to become . . . hmmm, oh I suppose it's just possible. If a Pole can, why not an Englishman again? Yes, I could just become Pope."
"Splendid! I would take personal pride in your becoming the Pope. And after Pope what?"
The priest looks at him in surprise, "After Pope? There's nothing after Pope! I mean, there's just God above the Pope. I can't become God."
"So why not?" the Rabbi said, "one of our boys made it."

Thanks to MadPriest!