heaven is a place where your soul goes. your soul is not composed of matter... it's a magic substance that can contain all your memories and thoughts. Magic! Your soul is bottled up inside your body while you're alive. when you die, it floats out and goes into another dimension we can't see, and then the christian god decides if you've been naughty or nice. if you've been naughty, you go to hell and suffer a punishment so horrible it's beyond human comprehension, and not just for a little while, but for all eternity. if you're nice, you go to heaven and enjoy an extreme pleasure & happiness, 200 times better than the most mindblowing orgasm, for ever and ever. And if you're "in between" and the christian god concludes there's not enough evidence, you go to purgatory and sit there until he decides to send Jesus back to Earth, and only then do you get to go have mindblowing orgasms in heaven.
Right? that's all completely reasonable and makes perfect sense. I wouldn't consider anyone "kinda stupid" or "completely absurd" for believing that.
and this only applies to humans, though. Other animals on Earth, despite having demonstrable feelings and personalities all just die and that's the end of it, because they don't have souls. Nothing inconsistent about that. And we know these things, alright???