Afterlife refers to the life of a person. For instance after they have died to the material plane of existence. At the point of transition from the physical body to our astral body. Above all there are spiritual helpers in the fourth dimension. Who will assist our reorientation to life in spirit.
The Tibetan book of the dead describes the process of dying; with guidance to afterlife. It is stated in the Lord’s prayer. That as it is on earth, so it is in heaven. We all remain the same person in the fourth dimension. With the only difference being in heaven; we do not have a physical body.