Samsara

In the Kaushitaki Upanishad, the souls of the dead ascend to the moon which is the door to heaven. There they are questioned as to their identity. If they fail to realise their identity with Braham, then they are condemned to further existence in the form of their karma - be it man or animal. If their soul gives the right answer, then it proceeds to the river "Ageless" where it shakes off its good and evil karma "as a horse shakes off its hairs".

How fucking depressing.