All living creatures have souls that leave the body after death and pass to the other world. They believe the other world is underground, and a mirror image of this one, with the same values but reversed space and time. Right in this world is left in the other, and down is up. The people in the other world walk with their feet upward. Summer in this world is winter in the other, day is night.
Souls stay in the one world until they are ready to return to the other.
Then they are reborn back into this world. All living creatures repeat this endless cycle of death and rebirth, an eternal shifting between the two worlds. There is no distinction of Heaven and Hell, and no judgment after death, but passing into the other world may sometimes have problems. The souls of extremely bad persons may be rejected by their ancestors. A shaman is summoned to convince the ancestors to accept the soul.