Claim. Because the Fall began with false parents and inherited a false seed, restoration requires True Parents — a literal Messiah whose seed is “injected and engrafted” so that humanity can return to God’s lineage.
Elaboration. §2.3.2 defines the true-parents mission as lineage-liquidation. “Why are the True Parents needed? They are needed to liquidate the base of Satan’s love, life, and lineage. How did man and woman fall into such a position? The fell through the sexual organ. Originally the sexual organ was the palace of love” (2.3.2. Why True Parents are needed, 218-176, 1991.7.28). The engrafting mechanism: “The Messiah must come upon the earth, and his seed, the seed of new life of the True Parents, must be injected and engrafted. Through this, you can return to the original position of the true olive tree” (ibid, 218-223, 1991.7.29). The implication is the highest-stakes claim in SMM teaching: the messianic mission is not symbolic, not merely moral, but biologically and lineally substitutive — a literal new bloodline whose recipients become “true olive trees” in place of the wild olive trees they were born as.
See also. csg-humankind-inherited-satans-lineage, messiah-is-the-true-parent