4 But when the kindness and love of God our Savior appeared, 5 he saved us, not because of righteous things we had done, but because of his mercy.
— Titus 3
God prefers to work when we give up on our own efforts and realize how utterly dependent we are on his mercy.
In the same way, he works best in marriages when couples give up their pride and unite in ways that honor him. The success of ANRs in strengthening marriages only proves how little we can do to save ourselves. Marriages are given a tremendous boost when couples humble themselves into doing something associated with infants. God really does work in mysterious ways.