from St. Ambrose, On the Mysteries and the Treatise on the Sacraments, Translations of Christian Liturature, Series III. Translated by T. Thompson, B.D., 1919, pp. 120-121.
Illustrations of the Blessings of Communion from Psalm 23 and from the Canticles
Therefore thou hast come to the altar, thou has received the body of Christ. Hear again what sacraments thou hast obtained. Hear holy David speaking. He too foresaw these mysteries in the spirit and rejoiced and said that he lacked nothing* Why? Because he that hath received the body of Christ shall never hunger.1
How often hast thou heard the twenty-second Psalm2 and not understood ? See how it is suited to the heavenly sacraments. The Lord is my shepherd; and I shall not want. In a green pasture, there hath he made me to lie down. He hath tended me by the water of comfort, he converteth my soul. He hath led me in the paths of righteousness for his name's sake. Yea, though I walk through the valley of the shadow of death, I will fear no evil, for thou art with me. Thy rod and thy staff, they have comforted me.3 Rod is rule, staff is passion ; that is the eternal Divinity of Christ, but also his passion in the body. The one created, the other redeemed. Thou hast prepared a table before me against them that trouble me. Thou hast anointed my head with oil, and my inebriating cup how glorious it is.4
An Explanation of the Bread, Wine, and Water Offering at the Proskomedia Service Before the Divine Liturgy
by St. Germanus of Constantinople
from his commentary On the Divine Liturgy, translated by Paul Meyendorff, St. Vladimir's Seminary Press, 1984, p. 71.
The bread of offering [offered by our prosfora bakers], which is purified, signifies the superabundant riches of the goodness of our God, because the Son of God became man and gave Himself as an offering and oblation in ransom and atonement for the life and salvation of the world He assumed the entirety of human nature, except for sin. He offered Himself as first-fruits and chosen whole burnt-offering to the God and Father on behalf of the human race, as is written: 'I am the bread which came down from heaven,” and 'He who eats this bread will live for ever' (Jn. 6:51). About this the Prophet Jeremiah says: 'Come, let us place a stake in his bread' (11:19 LXX), point to the wood of the cross nailed to His body.
The piece which is cut out [of the loaf] with the lance [by the priest] signifies that 'Like a sheep He is led to the slaughter, and like a lamb that before its shearer is dumb' (cf. Is. 54:7).
by St. Cyril of Alexandria
from his Commentary on the Gospel of St. Luke, ch. 4, vv. 38-39
But observe again, I pray, how great is the efficacy of the touch of His holy flesh. For It both drives away diseases of various kinds, and a crowd of demons, and overthrows the power of the devil, and heals a very great multitude of people in one moment in time. And though able to perform these miracles by a word and the inclination of His will, yet to teach us something useful for us, He also lays His hands upon the sick. For it was necessary, most necessary, for us to learn that the holy flesh which He had made His own was endowed with the activity of the power of the Word by His having implanted in It a godlike might. Let It then take hold of us, or rather let us take hold of It by the mystical 'Giving of thanks' [the Eucharist], that It may free us also from the sicknesses of the soul, and from the assault and violence of demons.
by Rev. Robert E. Lucas
from The Word, October 1963
At the holy supper, the Redeemer’s voice reverberated throughout the room in significant tones, “Do this is commemoration of Me.” Thus Holy Mother Church has since that day celebrated on myriad altars throughout time this great mystery and has united its faithful to Christ in the Holy Eucharist.
Our altars remain the centers of Christian life—the center for the priests who there go to offer the sacrifice and there make known the word of God. The Eucharist reposes on the altar and the altar must NEVER be regarded as a sacred shrine to be looked upon with reverence. But the Eucharist is a food to be received, it is food for life, for the proper living of the Christian life.
The greatest gift which the merciful God ever bestowed upon mankind is Jesus Christ. His delight was to be with the children of men. That He might be with them always as their changeless Friend, their inspiring Counselor, and their great High Priest, He instituted the sacrament of the real presence.