I used to think we could talk to spirits, or the dead. The religion I grew up in believed pretty firmly in the nature of spirits who had passed on, and that they could influence you directly, if you allowed them. Weren't supposed to talk to them directly, but it was in there for sure. Lots of material on it. In fact, they believe there's an entire world of spirits that exists as a plane after death, that you first wake up in.
Later experimentation with pagan philosophy certainly didn't preclude talking to the dead either. I didn't try a seance out... but there is a lot of belief of ghosts and the like. Never tried the seance thing, but I certainly knew of others who would. I didn't really want to bother the dead.
If someone came up to me and proved seances were real, won the Randi prize ( http://www.randi.org/site/index.php/1m-c
Nowadays, I follow a personally agnostic, and publically omniquantist sort of line of thinking. In a multiverse of a functionally incomprehensible number of dimensions, it is potentially possible that every form of belief is right. Ghosts? Sure. Talking to the dead through seances? Why not? Zombies who rise every easter? If that's what works for you, knock yourself out. For myself, I do not see evidence of any of that being possible for me, so I disregard it all.