i never really thought about -- what if the ghosts arent with jacob at all, but are somehow interfering. we tend to believe them cause theyre, you know, dead and their mere presence lends some mystical authority. but something about christian in that last scene makes me wonder if he's actually speaking for jacob (whoever, indeed, that is) or if smokemonster/ghosts/alpert have their own agenda. we still dont know who's on whose side because there's still too much information being withheld.