This essence exists in many worlds or dimensions. We all come from the inner worlds, and are embodied in an outer world we call the physical world. Beside those concrete techniques, meditation has different meanings. One is a contemplation technique, and another a more spiritual connection that controls the mind with a mantra. Anyway, this all prepares your awareness and inner knowledge to become conscious of some planes with your conscious mind, remembering that you exist simultanously and multidimensionally on all planes, and that it is only your attention that relates you to one or another reality or realm.
Reincarnation is a concept that perceives an evolution of the soul on a physical plane.
If you are able to perceive in a time-independent way, as the soul does, you are beyond it. One step in this self-realization might be the reality of Reincarnation. I was hoping to share some material beyond the somewhat limited hinduism understanding of the western world. When veda means knowing, then everywhere spirituality is practiced is a vedic culture. Needless to say, vedic culture exists anywhere on Earth where native teaching and spirituality are taught, but in most cases the teaching is fragmented or has nearly disappeared as a result of western influences.