Claim. The spirit-world is not a foreign destination but our original homeland — humans originate from the incorporeal God, descend through corporeal parents into earthly life, and return to the incorporeal world at death.
Elaboration. SMM uses the Korean phrase for dying (“returning”) as a doorway into the doctrine: “If someone dies of old age, in Korean we say that person ‘went back.’ When someone asks about our deceased grandparents we say, ‘They went back.’ To where did they return? They returned to the spirit world” (2.1. Death is the inevitable conclusion of earthly life, 242-166, 1993.1.1). The pre-existence frame is theological rather than reincarnational: “Since we originally come from the incorporeal God, the incorporeal world is our original homeland. From the incorporeal world we come to the corporeal world, prosper on this earth and then return to the incorporeal world” (ibid). The pattern is born-of-God → physical birth via father → physical life → return to spirit world. The doctrinal payoff is to reorient lifelong striving: earthly life is a temporary expedition, not the homeland, and homesickness for the spirit world is the proper religious affect.
See also. csg-physical-life-is-preparation-for-the-spirit-world