The priesthood of the New Testament is closely bound to the Eucharist. Because of this, today, on the solemnity of Corpus Domini and almost at the end of the Year for Priests, we are invited to meditate on the relationship between the Eucharist and the priesthood of Christ. Oriented in this direction also are the first reading and the responsorial psalm, which present the figure of Melchizedek.
The brief passage from the Book of Genesis (cf. 14:18-20) states that Melchizedek, king of Salem, was "priest of God Most High," and because of this "offered bread and wine" and "blessed Abram," returning from a victory in battle; Abram himself gave him a tenth of everything. The Psalm, in turn, contains in the last verse a solemn expression, an oath of God himself, who declares to the King Messiah: "You are a priest for ever after the order of Melchizedek" (Psalm 110:4); thus the Messiah is not only proclaimed king, but also priest.
From this passage the author of the Letter to the Hebrews takes the cue for his ample and articulated exposition. And we re-echoed it in the refrain: "You are a priest for ever, Lord Christ": virtually a profession of faith, which acquires a particular meaning in today's feast. It is the joy of the community, the joy of the whole Church that, contemplating and adoring the Most Blessed Sacrament, recognizes in it the real and permanent presence of Jesus as High and Eternal Priest.
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