Of Those Things Which a Man of God Spoke by the Spirit to Eli the Priest, Signifying that the Priesthood Which Had Been Appointed According to Aaron Was to Be Taken Away
But what is added, “And it shall come to pass that he who is left in your house shall come to worship him,” is not said properly of the house of this Eli, but of that Aaron, the men of which remained even to the advent of Jesus Christ, of which race there are not wanting men even to this present. For of that house of Eli it had already been said above, “And every one of your house that is left shall fall by the sword of men.” How, therefore, could it be truly said here, “And it shall come to pass that every one that is left shall come to worship him,” if that is true, that no one shall escape the avenging sword, unless he would have it understood of those who belong to the race of that whole priesthood after the order of Aaron? Therefore, if it is of these the predestinated remnant, about whom another prophet has said, “The remnant shall be saved;” whence the apostle also says, “Even so then at this time also the remnant according to the election of grace is saved;” since it is easily understood to be of such a remnant that it is said, “He that is left in your house,” assuredly he believes in Christ; just as in the time of the apostle very many of that nation believed; nor are there now wanting those, although very few, who yet believe, and in them is fulfilled what this man of God has here immediately added, “He shall come to worship him with a piece of money;” to worship whom, if not that Chief Priest, who is also God? For in that priesthood after the order of Aaron men did not come to the temple or altar of God for the purpose of worshipping the priest. But what is that he says, “With a piece of money,” if not the short word of faith, about which the apostle quotes the saying, “A consummating and shortening word will the Lord make upon the earth?” But that money is put for the word the psalm is a witness, where it is sung, “The words of the Lord are pure words, money tried with the fire.”
What then does he say who comes to worship the priest of God, even the Priest who is God? “Put me into one part of Your priesthood, to eat bread.” I do not wish to be set in the honor of my fathers, which is none; put me in a part of Your priesthood. For “I have chosen to be mean in Your house;” I desire to be a member, no matter what, or how small, of Your priesthood. By the priesthood he here means the people itself, of which He is the Priest who is the Mediator between God and men, the man Christ Jesus. This people the Apostle Peter calls “a holy people, a royal priesthood.” But some have translated, “Of Your sacrifice,” not “Of Your priesthood,” which no less signifies the same Christian people. Whence the Apostle Paul says, “We being many are one bread, one body.” [And again he says, “Present your bodies a living sacrifice.”] What, therefore, he has added, to “eat bread,” also elegantly expresses the very kind of sacrifice of which the Priest Himself says, “The bread which I will give is my flesh for the life of the world.” The same is the sacrifice not after the order of Aaron, but after the order of Melchisedec: let him that reads understand. Therefore this short and salutarily humble confession, in which it is said, “Put me in a part of Your priesthood, to eat bread,” is itself the piece of money, for it is both brief, and it is the Word of God who dwells in the heart of one who believes. For because He had said above, that He had given for food to Aaron's house the sacrificial victims of the Old Testament, where He says, “I have given your father's house for food all things which are offered by fire of the children of Israel,” which indeed were the sacrifices of the Jews; therefore here He has said, “To eat bread,” which is in the New Testament the sacrifice of the Christians.
Source: City of God (New Advent)