"They have Moses and the prophets, let them listen to them." If they can't listen to Moses and the Prophets, they won't listen even if a man came back from the dead.
That's what the Bible says. Remember the guy who wanted to go back and warn his kin? People would probably come up with all kinds of rationales to explain that someone hadn't really died.
(proudly posting w/o reading the thread since 2002)
I'm sorry, but that's bull puckey. If my dead father suddenly showed up in my living room, I'm pretty sure I'd listen to what he had to say.