I'm new on this site of Stack Exhcange. As a non-native speaker, I've been asking questions on ELL and ELU. However, I thought this might be related with religion (in this case, of course, Christianity) rather than language.
The following passage is an excerpt from god is not Great by Christopher Hitchens:
Pre-Christian hells were highly unpleasant too, and called upon the same sadistic ingenuity for their invention. However, some of the early ones we know of —most notably the Hindu— were limited in time. A sinner, for example, might be sentenced to a given number of years in hell, where every day counted as 6,400 human years. If he slew a priest, the sentence thus adjusted would be 149,504,000,000 years. At this point, he was allowed nirvana, which seems to mean annihilation. It was left to Christians to find a hell from which there was no possible appeal. (And the idea is easily plagiarized: I once heard Louis Farrakhan, leader of the heretical black-only “Nation of Islam,” as he drew a hideous roar from a mob in Madison Square Garden. Hurling spittle at the Jews, he yelled, “And don’t you forget — when it’s God who puts you in the ovens, it’s FOREVER!”).
I can't understand what he means by "appeal from hell" at all. I would be more than happy if anyone could explain me the meaning here.
Thank you very much.