For some, 7 spheres of afterlife existence have been identified.

1 is the animal level of uneducated and unresolved angers and emotions.
2 is the lower human unresolved entities of lower response to spirituality.
3 is the level of the elevated by earth education to spirituality. It is most like earth plane environment to make the newcomer welcome.
4 is the higher spirituality of those that have learned the earth lessons, with still more spiritual lessons to proceed.
5-7 are the planes we strive to achieve in light and love from where we begin in the afterlife following physical death. The more light, the less need of the spirit body we arrived in. We are absorbed into the light of God.

God bless, J