Claim. True filial piety cannot be reached by a single individual before marriage; it requires a spouse whose own filial standard is added to the child’s.
Elaboration. SMM rules out the bachelor saint as a category: “You cannot become a truly devoted son or daughter before you get married. You can only become a truly filial son or daughter after getting married. You can only establish the realm of true filial piety after you have married and the wife’s filial piety is added to the husband’s in front of the parents” (CSG 14.2 §2, 30-220, 1970.3.23). The same logic governs loyalty: “You cannot become a loyal citizen by yourself. The loyalty that the Unification Church talks about cannot be realized by one person alone. You can only become a loyal citizen after you marry and have a family.” The blessing is therefore not merely soteriological but ethical: marriage is the structural precondition that allows higher virtues to mature. The four-position-foundation supplies the underlying geometry — filial piety needs the horizontal couple before its vertical relation to parents resolves.
See also. csg-only-marriage-and-family-can-establish-true-loyalty