CCC 1642 Christ is the source of this grace. “Just as of old God encountered his people with a covenant of love and fidelity, so our Savior, the spouse of the Church, now encounters Christian spouses through the sacrament of Matrimony.”1 Christ dwells with them, gives them the strength to take up their crosses and so follow him, to rise again after they have fallen, to forgive one another, to bear one another’s burdens, to “be subject to one another out of reverence for Christ,”2 and to love one another with supernatural, tender, and fruitful love. In the joys of their love and family life he gives them here on earth a foretaste of the wedding feast of the Lamb:
How can I ever express the happiness of a marriage joined by the Church, strengthened by an offering, sealed by a blessing, announced by angels, and ratified by the Father?. .. How wonderful the bond between two believers, now one in hope, one in desire, one in discipline, one in the same service! They are both children of one Father and servants of the same Master, undivided in spirit and flesh, truly two in one flesh. Where the flesh is one, one also is the spirit.3
1 GS 48 # 2.
2 Eph 5:21; cf. Gal 6:2.
3 Tertullian, Ad uxorem. 2, 8, 6-7: PL 1, 1412-1413; cf. FC 13.