Most, if not all beliefs of the afterlife are frightening to an extent.
Nonexistence: Frightening because it's impossible for people to imagine nothingness. If people imagine a world where they didn't exist they see it through their eyes, if they imagine nothingness they imagine complete blackness, whiteness or a color they associate with nothingness and they are completely aware of themsevles. Also most people don't leave a huge mark on the world so it would be like you never existed at all; i mean how many people actually remember who their great great great great great great great grandfather was?
Reincarnation: An endless cycle of life and death. Even if you couldn't remember your past lives it is still frightening to some.
Heaven & Hell (depends on your beliefs)
Hell 1: Eternal torture
Hell 2: Basically nonexistence except you're aware for the rest of eternity.
Heaven 1: A place where you're more or less forced to be happy for all eternity.
Heaven 2: A paradise where all your wishes come true, but living in paradise for an eternity would become quite boring.
Nonexistence: Frightening because it's impossible for people to imagine nothingness. If people imagine a world where they didn't exist they see it through their eyes, if they imagine nothingness they imagine complete blackness, whiteness or a color they associate with nothingness and they are completely aware of themsevles. Also most people don't leave a huge mark on the world so it would be like you never existed at all; i mean how many people actually remember who their great great great great great great great grandfather was?
Reincarnation: An endless cycle of life and death. Even if you couldn't remember your past lives it is still frightening to some.
Heaven & Hell (depends on your beliefs)
Hell 1: Eternal torture
Hell 2: Basically nonexistence except you're aware for the rest of eternity.
Heaven 1: A place where you're more or less forced to be happy for all eternity.
Heaven 2: A paradise where all your wishes come true, but living in paradise for an eternity would become quite boring.