ACC ~ Hebrews 7 v17

AARON AND MELCHIZEDEK AS PRIESTLY TYPES. ORIGEN: Just as the people of old, who were called the people of God, were divided into twelve tribes plus the levitical order, and this order itself, which engaged in service of the Divine, was divided into additional priestly and levitical orders, so, I think, all the people of Christ according to “the hidden person of the heart,” who bear the name “Jew inwardly” and who have been circumcised “in spirit,” possess the characteristics of the tribes in a more mystical manner. …

Most of us who approach the teachings of Christ, since we have much time for the activities of life and offer a few acts to God, would perhaps be those from the tribes who have a little fellowship with the priests and support the service of God in a few things. But those who devote themselves to the divine Word and truly exist by the service of God alone will properly be said to be Levites and priests in accordance with the excellence of their activities in this work.

And, perhaps, those who excel all others and who hold, as it were, the first places of their generation will be high priests according to the order of Aaron, but not according to the order of Melchizedek. If someone should object to this, thinking that we are impious when we prescribe the title of high priest for humans, since Jesus is proclaimed as great priest in many places—for we have “a great high priest who has passed through the heavens, Jesus, the Son of God”—we would have to say to him that the apostle indicated this when he said that the prophet said of Christ, “You are a priest forever after the order of Melchizedek,” and not after the order of Aaron. On this basis, we too say that humans can be high priests according to the order of Aaron, but only the Christ of God according to the order of Melchizedek. COMMENTARY ON THE GOSPEL OF JOHN 1.1, 1.10-11.

THE TRUE PONTIFF, JESUS CHRIST. BRAULIO OF SARAGOSSA: It is better to be in doubt about hidden matters than to quarrel about what is uncertain. Let us turn to what is true and firm, to what most assuredly keeps any Christian and good Catholic from doubting or quibbling. That is, through the sacrament, bread and wine offered to God become for us the true body and blood of Christ, according to the words of the Lord himself and the sacred Scriptures composed by the Holy Spirit. This sacrament the Catholic church offers daily on its altar “after the order of Melchizedek” by the true pontiff, Jesus Christ, with mystical understanding and an ineffable dearth of speech, because surpassing grace goes beyond everything. LETTER 42.

THE MYSTERY OF HIS SACRIFICE IS REENACTED IN THE EUCHARIST. BEDE: And in the Apocalypse, John the apostle … says, “Who loved us and washed from us our sins in his blood.” Not only did he wash away our sins in his blood when he gave his blood for us on the cross, or when each of us was cleansed in his baptism by the mystery of his most sacred passion. But he also takes away every day the sins of the world and washes us of our daily sins in his blood, when the memory of his blessed passion is reenacted on the altar, when a created thing, bread and wine, is transformed by the ineffable sanctification of the Spirit into the sacrament of his flesh and blood. Thus his body and blood is not poured forth and slain by the hands of the unfaithful to their own ruin, but he is taken by the mouth of the faithful to their salvation.

The lamb in the law of Passover rightly shows us a type of him, since, having once liberated the people from their Egyptian servitude, it sanctified the people every year by being immolated in memory of their liberation, until he came, to whom such a sacrificial offering gave testimony. When he was offered to the Father for us as a sacrificial offering and for a sweet savor, he transformed, by the lamb that was offered, the mystery of his passion into a created thing, bread and wine, having been made “a priest forever after the order of Melchizedek.” HOMILIES ON THE GOSPELS 1.15.

Heb