Here we see the essential work of Christ as Bridegroom of the Church:
"O Lord, may our Mediator Jesus Christ make these offerings agreeable to Thee: and along with Himself may He offer us to Thee as a thank-offering: Who livest and reigneth."-Secret of the Votive Mass of Christ the Priest.
In one single act, Christ gives Himself to His Bride in the Eucharist (Eucharist=thanksgiving; which we hear in the prayer) and, being thus filled with Him, She becomes a part of Him and they, as One Whole, are offered up by Christ to the Father. They exist in sacrifice where they are offered to the Father together, Him as Her Protector and Her as His Support. Likewise earthly bridegroom and bride exist in a state of offering themselves to the Father together for each other, him as her protector and her as his support; each giving the other what he needs to get to Heaven.
In the Postcommunion we see the fruits of this sacrifice (emphasis mine):
"We beseech Thee, O Lord, may the Divine Host which we have offered up and received quicken us: that, bound to thee by an eternal love, we may bear fruit that will abide forever. Through Our Lord."-Postcommunion of the Votive Mass of Christ the Priest.