The whole redeemed city, that is to say, the congregation or community of the saints, is offered to God as our sacrifice through the great High Priest, who offered Himself to God in His passion for us, that we might be members of this glorious head, according to the form of a servant. For it was this form He offered, in this He was offered, because it is according to it He is Mediator, in this He is our Priest, in this the Sacrifice. Accordingly, when the apostle had exhorted us to present our bodies a living sacrifice, holy, acceptable to God, our reasonable service, and not to be conformed to the world, but to be transformed in the renewing of our mind, that we might prove what is that good, and acceptable, and perfect will of God, that is to say, the true sacrifice of ourselves, he says, “For I say, through the grace of God which is given unto me, to every man that is among you, not to think of himself more highly than he ought to think, but to think soberly, according as God hath dealt to every man the measure of faith. For, as we have many members in one body, and all members have not the same office, so we, being many, are one body in Christ, and every one members one of another, having gifts differing according to the grace that is given to us.” This is the sacrifice of Christians: we, being many, are one body in Christ. And this also is the sacrifice which the Church continually celebrates in the sacrament of the altar, known to the faithful, in which she teaches that she herself is offered in the offering she makes to God.