21. Make you perfect—properly said of healing a rent; join you together in perfect harmony [Bengel].
to do his will, working in you—(Heb 10:36); rather as Greek, "doing in you." Whatever good we do, God does in us.
well-pleasing in his sight—(Isa 53:10; Eph 5:10).
through Jesus Christ—"God doing (working) in you that … through Jesus Christ" (Php 1:11).
to whom—to Christ. He closes as he began (Heb 1:1-14), with giving glory to Christ.