George,
I would say that the Church’s business is in blessing marriages, through which the “great mystery” of Christ and His bride, the Church, may be revealed. She prays that the taking of this “earthly element” - so to speak - into Christ, will be used of the Triune God to manifest the Gospel itself through the Bridegroom’s laying down His life for His beloved, and the bride’s joyful submission to her Bridegroom. And I love that in the classic marriage rite of our Church from Martin Luther, the closing prayer isn’t just for the bride and groom. Rather:
O God, who hast created man and woman and hast ordained them for the married estate, hast blessed them with fruits of the womb, and hast thereby typified the sacramental union of thy dear Son, the Lord Jesus, and the church, his bride: We beseech thy groundless goodness and mercy that thou wouldst not permit this thy creation, ordinance, and blessing to be disturbed or destroyed, but graciously preserve the same; through Jesus Christ, our Lord. AE 51:115.