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Dear Friend,You have been robbed of the truth.
From http://www.ewtn.com/faith/teachings/euchc3.htm

One of the most important ways that the Old Covenant foreshadows the New is in its use of the image of the sacrificial lamb. Let's see how this relates to the Eucharist in Scripture.

First, take a look at Revelation 5. In Revelation 5, there is a scroll with seven seals that nobody can break open and everybody is really upset. In fact John almost begins to cry. In 5, verse 2, "A strong angel proclaimed with a loud voice, 'Who is worthy to open the scroll and break its seals?' And no one in heaven and on earth or under the earth was able to open the scroll or to look into it." What is the scroll? The word is biblion. Most likely it's a reference to a covenant document, the New Covenant document that nobody is worthy to break open. "And I wept much, but no one was found worthy to open the scroll or to look into it," because this scroll would consummate and fulfill the promises of the Old Testament.

"Then one of the elders said to me, 'Weep not. Lo, the Lion of the tribe of Judah, the Root of David, he has conquered so that he can open the scroll and seven seals.'" You could almost feel the hallelujah rising up from within your soul. The Lion of the tribe of Judah! You turn. You look and John turns to look and what does he see in verse 6, " And between the throne and the four living creatures and among the elders I saw," what? Aslan, the lion? No. David crowned with glory? No. You'd think so, a lion and a king are the words used to describe it. "I turned and I saw a lamb standing, looking as though it had been slain."

Jesus Christ is the son of David and the king of the new and heavenly Jerusalem. He is the Lion of the tribe of Judah and He is the Lamb of God, slain from the foundation of the world, as it said elsewhere in Revelation. But here in heaven on the throne of glory, after His crucifixion, Hs resurrection, His ascension, His enthronement, He still looks like a lamb. He still looks as though He had been slain. Why not clean up the body? Why not wipe away the wounds? Why continue resembling a lamb? Because He's continuing the Passover offerings, the sacrifice. Not by dying, not by bleeding and not by suffering but by continuing to offer up Himself as the firstborn and as the unblemished lamb, as the perpetual, timeless, everlasting sacrifice of praise to the Father.

And what do the people do? They rejoice and they break out into a song. And what is the song, "Worthy art thou to take the scroll and to open its seals for thou was slain." Past tense, "And by thy blood didst ransom men for God from every tribe and tongue and people and nation." And what has he done? He's become a priest to be sure, but for what purpose? "He has made them a kingdom and priest to our God." He has made those whom he has saved priests. And what do priests do? They offer sacrifice.

Has Christ's sacrifice ended all sacrifices? No. Christ's sacrifice has ended all ineffective, bloody animal sacrifices that never did anything anyway. Now for the first time in history we can really begin to offer sacrifice to God. Romans 12 says, "Offer your bodies as a living sacrifice, holy and acceptable to God." And it wouldn't be holy and acceptable except that it's united to Christ's perpetual sacrifice. He's not bleeding. He's not dying. He's not suffering, but he is offering a sacrifice as a lamb does, as a priest king does continually, forever.

And that's what it's all about. John wouldn't see a lamb looking as though it had been slain if the whole kit and caboodle was completed and done. Yes, it's completed and done, but it's still going on, and it's going to go on forever in the future. Why? Because Jesus Christ is the same yesterday, today and forever, as Hebrews tells us.

Now, is this strange? Is this teaching novel? Well, let's take a look at 1st Corinthians and see how natural it seems to the apostle Paul. We have already looked at 1st Corinthians 5, "Christ, our Passover," that's in verse 7, "Christ, our Paschal Lamb has been sacrificed. Let us therefore celebrate the festival not with the old leaven, the leaven of malice and evil, but with the unleavened bread of sincerity and truth." What's he talking about? Is he talking about leaven being like sin. No. He's saying let us celebrate the feast with unleavened bread. What feast? The Eucharist! The sacrifice continues because communion must be celebrated. We've got to eat the lamb, the resurrected, glorified, enthroned lamb that still looks as though he'd been slain because he's still giving himself to us.

Turn over with me now to Corinthians, chapter 9, verse 13. He says, "Do you not know that those who are employed in the temple service get their food from the temple and those who serve at the altar share in the sacrificial offerings in the same way the Lord commanded. That those who proclaim the gospel should get their living by the gospel." Now we might be tempted to read Corinthians 9, 13 and 14 and say, "Well, back in the Old Testament they did temple service and altar service and sacrifice, but now in the New Testament they only proclaim the word."

The problem with that is that Paul goes on to say, Corinthians 11, as we will see, how Christ's death is proclaimed. Take a look with me at 1st Corinthians, 11:23-26. "For I received from the Lord what I shall deliver to you." Interesting, he received it not from Peter and the apostles. When Jesus appeared to Paul on the road to Damascus or perhaps at some other time, what did Jesus deliver to Paul? Instructions for the Eucharist. "I received from the Lord what I also deliver to you. That the Lord Jesus Christ, on the night when He was betrayed, took bread, and when He had given thanks, He broke it and said, 'This is my body, which is for you. Do this in remembrance of me.' In the same way also the cup after supper saying, 'This cup is the New Covenant in my blood. Do this." Commandment, imperative tense. "As often as you drink it in remembrance of me. For as often as you eat this bread and drink the cup, you proclaim the Lord's death until He comes."

You proclaim the gospel. Let's go back then to Corinthians 9, verse 14, "In the same way the Lord commanded that those who proclaim the gospel should get their living by the gospel." How does Paul proclaim the gospel? Just by preaching? Or by celebrating the Eucharist? "As often as you do this, you proclaim the Lord's death until He comes." That's the gospel. Paul is talking in verses 13 and 14 about how he should be supported as an apostle and he does so in conjunction with temple service at an altar where there is sacrificial offerings which he as an apostle has the right to receive from. What's he talking about? A New Covenant temple? A New Covenant altar? A New Covenant sacrifice where he proclaims the gospel by celebrating the Eucharist.

Now let's go on to Corinthians 10 and get things straight really quickly here because Corinthians 10, gives us a proper warning. In the first ten verses of Corinthians 10, Paul says that back in the Old Testament with Moses, verse 3, "They all ate the same supernatural food and all drank the same supernatural drink." The water from the rock and the manna in the wilderness and both, Paul says in a sense, were signs of Christ's presence among them. Nevertheless, verse 5, "with most of them God was not pleased for they were overthrown in the wilderness."

In the next three verses he describes the Golden Calf incident where thousands of them died. In other words just because you receive supernatural food and drink doesn't mean you've got it made in the shade. You have to set things right with God and keep things right with the Lord. Verse 11, "Now these things happened to them as a warning, but they were written down for our instruction upon whom the end of the ages has come." We now have a greater and much more supernatural food and drink. So we can relax? No. We've got to be even more circumspect in searching out our hearts and making sure we are right with God.

He goes on in verse 16, "The cup of blessing which we bless, is it not a coenia, a communion, a participation in the blood of Christ?" Not a symbol. But a share, a communion. The bread which we break , is it not a coenia, a communion in the body of Christ. "Because there is one bread, we who are many are one body for we all partake of the one bread." He doesn't mean to say that there's one enormous loaf that we all take a piece from. There are many loaves of bread. There are many breads in that earthly sense, but there's only one bread in the heavenly sense, and that's Christ. Because we receive from one bread Christ, the Bread of Life, we who are many become one body, namely, the Body of Christ. He's suggesting that we become what we eat.

He goes on to contrast our sacrifice with other sacrifices and he says, verse 18, "Consider the people of Israel. Are not those who eat the sacrifices partners in the altar?" What he is saying is back then when you eat the sacrifice, you have a communion in the altar of those animals. Now we have a communion on all of our altars in the New Covenant with Christ, the Lamb of God. Verse 21, "You cannot drink the cup of the Lord and the cup of demons. You cannot partake of the table of the Lord and the table of demons. Shall we provoke the Lord with jealousy? Are we stronger than he?" For some reason God takes this with the utmost seriousness. Why?

Corinthians 11, he spells it out even clearer. We've already read verses 23 through 26. Now we can conclude with verse 27 where he says, "Whoever, therefore, eats the bread and drinks the cup of the Lord in an unworthy manner will be guilty of the Body and the Blood of the Lord." Now that language is actually like civil judicial language. Somebody who's practically guilty of murder or capital offense is guilty of the body and blood. Now if it's only a symbol, he might be guilty in some lesser sense, but when you profane the Lord's Supper, you actually become guilty of profaning the Body and Blood of the Lord. "Let a man examine himself, therefore, and so eat of the bread and drink of the cup. For anyone who eats and drinks without discerning," -- the symbolism? No. "...the body, eats and drinks judgment upon himself."

Now is he just speaking metaphorically? He couldn't be because in the next verse he says, "That is why many of you are weak and ill and some have died." To receive the Eucharist in a state of mortal sin is playing with fire of the worst sort. He goes on in chapter 12, verse 12, "For just as the body is one," the Church, that is, "...and has many members and all the members of the body though many are one body, so it is with Christ for by one Spirit we were all baptized in the one body." When we received the water of Baptism, we received the Spirit of God. "And all were made to drink of the one Spirit." When we receive Eucharist, Communion, we receive the Spirit as well as the flesh and the blood and the body, soul, humanity and divinity of Christ.

This is significant, very significant. This, in fact, gives us the whole interpretive key to the Book of Revelation. Many non-Catholic as well as Catholic scholars have noticed that the whole structure of Revelation is a big Passover liturgy where Christ, the Priest King, the firstborn Son and the Lamb looking as though it's been slain conducts and celebrates the heavenly liturgy. And the earthly liturgy is meant to be a reflection in that, a participation in that, and the early Church took it for granted. There is the Lamb looking as though it's been slain and making all of the people in heaven priests so they can assist in the offering of the firstborn son of God to the Father and join themselves with it.

One more important fact for you ,dear friend.
EVERY SINGLE EARLY CHURCH FATHER(Not a single exeption) believed in the true presence of Jesus in the Echarist.

"For not as common bread and common drink do we receive these; but in like manner as Jesus Christ our Saviour, having been made flesh and blood for our salvation, so likewise have we been taught that the food which is blessed by the prayer of His word, and from which our blood and flesh by transmutation are nourished, is the flesh and blood of that Jesus who was made flesh." Justin Martyr, First Apology, 66 (A.D. 110-165).

"He acknowledged the cup (which is a part of the creation) as his own blood, from which he bedews our blood; and the bread (also a part of creation) he affirmed to be his own body, from which he gives increase to our bodies." Irenaeus, Against Heresies, V:2,2 (c. A.D. 200).

"Then, having taken the bread and given it to His disciples, He made it His own body, by saying, 'This is my body,' that is, the figure of my body. A figure, however, there could not have been, unless there were first a veritable body. An empty thing, or phantom, is incapable of a figure. If, however, (as Marcion might say,) He pretended the bread was His body, because He lacked the truth of bodily substance, it follows that He must have given bread for us. It would contribute very well to the support of Marcion's theory of a phantom body, that bread should have been crucified! But why call His body bread, and not rather (some other edible thing, say) a melon, which Marcion must have had in lieu of a heart! He did not understand how ancient was this figure of the body of Christ, who said Himself by Jeremiah: 'I was like a lamb or an ox that is brought to the slaughter, and I knew not that they devised a device against me, saying, Let us cast the tree upon His bread,' which means, of course, the cross upon His body. And thus, casting light, as He always did, upon the ancient prophecies, He declared plainly enough what He meant by the bread, when He called the bread His own body.” Tertullian, Against Marcion, 40 (A.D. 212).

“He likewise, when mentioning the cup and making the new testament to be sealed 'in His blood,' affirms the reality of His body. For no blood can belong to a body which is not a body of flesh. If any sort of body were presented to our view, which is not one of flesh, not being fleshly, it would not possess blood. Thus, from the evidence of the flesh, we get a proof of the body, and a proof of the flesh from the evidence of the blood. In order, however, that you may discover how anciently wine is used as a figure for blood, turn to Isaiah, who asks, 'Who is this that cometh from Edom, from Bosor with garments dyed in red, so glorious in His apparel, in the greatness of his might? Why are thy garments red, and thy raiment as his who cometh from the treading of the full winepress?' The prophetic Spirit contemplates the Lord as if He were already on His way to His passion, clad in His fleshly nature; and as He was to suffer therein, He represents the bleeding condition of His flesh under the metaphor of garments dyed in red, as if reddened in the treading and crushing process of the wine-press, from which the labourers descend reddened with the wine-juice, like men stained in blood. Much more clearly still does the book of Genesis foretell this, when (in the blessing of Judah, out of whose tribe Christ was to come according to the flesh) it even then delineated Christ in the person of that patriarch, saying, 'He washed His garments in wine, and His clothes in the blood of grapes'--in His garments and clothes the prophecy pointed out his flesh, and His blood in the wine. Thus did He now consecrate His blood in wine, who then (by the patriarch) used the figure of wine to describe His blood." Tertullian, Against Marcion, 40 (A.D. 212).

"He once in Cana of Galilee, turned the water into wine, akin to blood, and is it incredible that He should have turned wine into blood?" Cyril of Jerusalem, Catechetical Lectures, XXII:4 (c. A.D. 350).

"Having learn these things, and been fully assured that the seeming bread is not bread, though sensible to taste, but the Body of Christ; and that the seeming wine is not wine, though the taste will have it so, but the Blood of Christ; and that of this David sung of old, saying, And bread strengtheneth man's heart, to make his face to shine with oil, 'strengthen thou thine heart,' by partaking thereof as spiritual, and "make the face of thy soul to shine."" Cyril of Jerusalem, Catechetical Lectures, XXII:8 (c. A.D. 350).

"Then having sanctified ourselves by these spiritual Hymns, we beseech the merciful God to send forth His Holy Spirit upon the gifts lying before Him; that He may make the Bread the Body of Christ, and the Wine the Blood of Christ; for whatsoever the Holy Ghost has touched, is surely sanctified and changed." Cyril of Jerusalem, Catechetical Lectures, XXIII:7 (c. A.D. 350).

"Let us then in everything believe God, and gainsay Him in nothing, though what is said seem to be contrary to our thoughts and senses, but let His word be of higher authority than both reasonings and sight. Thus let us do in the mysteries also, not looking at the things set before us, but keeping in mind His sayings. For His word cannot deceive, but our senses are easily beguiled. That hath never failed, but this in most things goeth wrong. Since then the word saith, 'This is my body,' let us both be persuaded and believe, and look at it with the eyes of the mind. For Christ hath given nothing sensible, but though in things sensible yet all to be perceived by the mind...How many now say, I would wish to see His form, the mark, His clothes, His shoes. Lo! Thou seest Him, Thou touchest Him, thou eatest Him. And thou indeed desirest to see His clothes, but He giveth Himself to thee not to see only, but also to touch and eat and receive within thee." John Chrysostom, Gospel of Matthew, Homily 82 (A.D. 370).

"You will see the Levites bringing the loaves and a cup of wine, and placing them on the table. So long as the prayers and invocations have not yet been made, it is mere bread and a mere cup. But when the great and wonderous prayers have been recited, then the bread becomes the body and the cup the blood of our Lord Jesus Christ....When the great prayers and holy supplications are sent up, the Word descends on the bread and the cup, and it becomes His body." Athanasius, Sermon to the Newly Baptized, PG 26, 1325 (ante A.D. 373).

"Then He added: 'For My Flesh is meat indeed, and My Blood is drink [indeed].' Thou hearest Him speak of His Flesh and of His Blood, thou perceivest the sacred pledges, [conveying to us the merits and power] of the Lord's death, and thou dishonourest His Godhead. Hear His own words: 'A spirit hath not flesh and bones.' Now we, as often as we receive the Sacramental Elements, which by the mysterious efficacy of holy prayer are transformed into the Flesh and the Blood, "do show the Lord's Death.'" Ambrose, On the Christian Faith, 4, 10:125 (A.D. 380).

“Rightly, then, do we believe that now also the bread which is consecrated by the Word of God is changed into the Body of God the Word. For that Body was once, by implication, bread, but has been consecrated by the inhabitation of the Word that tabernacled in the flesh. Therefore, from the same cause as that by which the bread that was transformed in that Body was changed to a Divine potency, a similar result takes place now. For as in that case, too, the grace of the Word used to make holy the Body, the substance of which came of the bread, and in a manner was itself bread, so also in this case the bread, as says the Apostle, 'is sanctified by the Word of God and prayer'; not that it advances by the process of eating to the stage of passing into the body of the Word, but it is at once changed into the body by means of the Word, as the Word itself said, 'This is My Body.'” Gregory of Nyssa, The Great Catechism, 37 (post A.D. 383).

Jesus’ Real Presence in the Eucharist
"They abstain from the Eucharist and from prayer, because they confess not the Eucharist to be the flesh of our Saviour Jesus Christ, which suffered for our sins, and which the Father, of His goodness, raised up again." Ignatius of Antioch, Epistle to Smyrnaeans, 7,1 (c. A.D. 110).

"For not as common bread and common drink do we receive these; but in like manner as Jesus Christ our Saviour, having been made flesh and blood for our salvation, so likewise have we been taught that the food which is blessed by the prayer of His word, and from which our blood and flesh by transmutation are nourished, is the flesh and blood of that Jesus who was made flesh." Justin Martyr, First Apology, 66 (c. A.D. 110-165).

"[T]he bread over which thanks have been given is the body of their Lord, and the cup His blood..." Irenaeus, Against Heresies, IV:18,4 (c. A.D. 200).

"He acknowledged the cup (which is a part of the creation) as his own blood, from which he bedews our blood; and the bread (also a part of creation) he affirmed to be his own body, from which he gives increase to our bodies." Irenaeus, Against Heresies, V:2,2 (c. A.D. 200).

"But what consistency is there in those who hold that the bread over which thanks have been given is the Body of their Lord, and the cup His Blood, if they do not acknowledge that He is the Son of the Creator of the world..." Irenaeus, Against Heresies, IV:18, 2 (c. A.D. 200).

"For the blood of the grape--that is, the Word--desired to be mixed with water, as His blood is mingled with salvation. And the blood of the Lord is twofold. For there is the blood of His flesh, by which we are redeemed from corruption; and the spiritual, that by which we are anointed. And to drink the blood of Jesus, is to become partaker of the Lord's immortality; the Spirit being the energetic principle of the Word, as blood is of flesh. Accordingly, as wine is blended with water, so is the Spirit with man. And the one, the mixture of wine and water, nourishes to faith; while the other, the Spirit, conducts to immortality. And the mixture of both--of the water and of the Word--is called Eucharist, renowned and glorious grace; and they who by faith partake of it are sanctified both in body and soul." Clement of Alexandria, The Instructor, 2 (ante A.D. 202).

"Then, having taken the bread and given it to His disciples, He made it His own body, by saying, 'This is my body,' that is, the figure of my body. A figure, however, there could not have been, unless there were first a veritable body…He did not understand how ancient was this figure of the body of Christ, who said Himself by Jeremiah: 'I was like a lamb or an ox that is brought to the slaughter, and I knew not that they devised a device against me, saying, Let us cast the tree upon His bread,' which means, of course, the cross upon His body. And thus, casting light, as He always did, upon the ancient prophecies, He declared plainly enough what He meant by the bread, when He called the bread His own body. He likewise, when mentioning the cup and making the new testament to be sealed 'in His blood,' affirms the reality of His body. For no blood can belong to a body which is not a body of flesh. If any sort of body were presented to our view, which is not one of flesh, not being fleshly, it would not possess blood. Thus, from the evidence of the flesh, we get a proof of the body, and a proof of the flesh from the evidence of the blood." Tertullian, Against Marcion, 40 (A.D. 212).

"For because Christ bore us all, in that He also bore our sins, we see that in the water is understood the people, but in the wine is showed the blood of Christ...Thus, therefore, in consecrating the cup of the Lord, water alone cannot be offered, even as wine alone cannot be offered. For if any one offer wine only, the blood of Christ is dissociated from us; but if the water be alone, the people are dissociated from Christ; but when both are mingled, and are joined with one another by a close union, there is completed a spiritual and heavenly sacrament. Thus the cup of the Lord is not indeed water alone, nor wine alone, unless each be mingled with the other; just as, on the other hand, the body of the Lord cannot be flour alone or water alone, unless both should be united and joined together and compacted in the mass of one bread; in which very sacrament our people are shown to be made one, so that in like manner as many grains, collected, and ground, and mixed together into one mass, make one bread; so in Christ, who is the heavenly bread, we may know that there is one body, with which our number is joined and united." Cyprian, To Caeilius, Epistle 62(63):13 (A.D. 253).

"Having learn these things, and been fully assured that the seeming bread is not bread, though sensible to taste, but the Body of Christ; and that the seeming wine is not wine, though the taste will have it so, but the Blood of Christ; and that of this David sung of old, saying, And bread strengtheneth man's heart, to make his face to shine with oil, 'strengthen thou thine heart,' by partaking thereof as spiritual, and "make the face of thy soul to shine."" Cyril of Jerusalem, Catechetical Lectures, XXII:8 (c. A.D. 350).

"For as to what we say concerning the reality of Christ's nature within us, unless we have been taught by Him, our words are foolish and impious. For He says Himself, My flesh is meat indeed, and My blood is drink indeed. He that eateth My flesh and drinketh My blood abideth in Me, and I in him. As to the verity of the flesh and blood there is no room left for doubt. For now both from the declaration of the Lord Himself and our own faith, it is verily flesh and verily blood. And these when eaten and drunk, bring it to pass that both we are in Christ and Christ in us. Is not this true? Yet they who affirm that Christ Jesus is not truly God are welcome to find it false. He therefore Himself is in us through the flesh and we in Him, whilst together with Him our own selves are in God." Hilary of Poitiers, On the Trinity, 8:14 (inter A.D. 356-359).

"Let us then in everything believe God, and gainsay Him in nothing, though what is said seem to be contrary to our thoughts and senses, but let His word be of higher authority than both reasonings and sight. Thus let us do in the mysteries also, not looking at the things set before us, but keeping in mind His sayings. For His word cannot deceive, but our senses are easily beguiled. That hath never failed, but this in most things goeth wrong. Since then the word saith, 'This is my body,' let us both be persuaded and believe, and look at it with the eyes of the mind. For Christ hath given nothing sensible, but though in things sensible yet all to be perceived by the mind. So also in baptism, the gift is bestowed by a sensible thing, that is, by water; but that which is done is perceived by the mind, the birth, I mean, and the renewal. For if thou hadst been incorporeal, He would have delivered thee the incorporeal gifts bare; but because the soul hath been locked up in a body, He delivers thee the things that the mind perceives, in things sensible. How many now say, I would wish to see His form, the mark, His clothes, His shoes. Lo! Thou seest Him, Thou touchest Him, thou eatest Him. And thou indeed desirest to see His clothes, but He giveth Himself to thee not to see only, but also to touch and eat and receive within thee." John Chrysostom, Gospel of Matthew, Homily 82 (A.D. 370).

"It is good and beneficial to communicate every day, and to partake of the holy body and blood of Christ. For He distinctly says, 'He that eateth my flesh and drinketh my blood hath eternal life.' And who doubts that to share frequently in life, is the same thing as to have manifold life. I, indeed, communicate four times a week, on the Lord's day, on Wednesday, on Friday, and on the Sabbath, and on the other days if there is a commemoration of any Saint.” Basil, To Patrician Caesaria, Epistle 93 (A.D. 372).

"You will see the Levites bringing the loaves and a cup of wine, and placing them on the table. So long as the prayers and invocations have not yet been made, it is mere bread and a mere cup. But when the great and wonderous prayers have been recited, then the bread becomes the body and the cup the blood of our Lord Jesus Christ...When the great prayers and holy supplications are sent up, the Word descends on the bread and the cup, and it becomes His body." Athanasius, Sermon to the Newly Baptized, PG 26, 1325 (ante A.D. 373).

“…if a person sees bread he also, in a kind of way, looks on a human body, for by the bread being within it the bread becomes it, so also, in that other case, the body into which God entered, by partaking of the nourishment of bread, was, in a certain measure, the same with it; that nourishment, as we have said, changing itself into the nature of the body. For that which is peculiar to all flesh is acknowledged also in the case of that flesh, namely, that that Body too was maintained by bread; which Body also by the indwelling of God the Word was transmuted to the dignity of Godhead. Rightly, then, do we believe that now also the bread which is consecrated by the Word of God is changed into the Body of God the Word. For that Body was once, by implication, bread, but has been consecrated by the inhabitation of the Word that tabernacled in the flesh. Therefore, from the same cause as that by which the bread that was transformed in that Body was changed to a Divine potency, a similar result takes place now. For as in that case, too, the grace of the Word used to make holy the Body, the substance of which came of the bread, and in a manner was itself bread, so also in this case the bread, as says the Apostle, 'is sanctified by the Word of God and prayer'; not that it advances by the process of eating to the stage of passing into the body of the Word, but it is at once changed into the body by means of the Word, as the Word itself said, 'This is My Body.'” Gregory of Nyssa, The Great Catechism, 37 (post A.D. 383).

“ Seeing, too, that all flesh is nourished by what is moist (for without this combination our earthly part would not continue to live), just as we support by food which is firm and solid the solid part of our body, in like manner we supplement the moist part from the kindred element; and this, when within us, by its faculty of being transmitted, is changed to blood, and especially if through the wine it receives the faculty of being transmuted into heat. Since, then, that God-containing flesh partook for its substance and support of this particular nourishment also, and since the God who was manifested infused Himself into perishable humanity for this purpose, viz. that by this communion with Deity mankind might at the same time be deified, for this end it is that, by dispensation of His grace, He disseminates Himself in every believer through that flesh, whose substance comes from bread and wine, blending Himself with the bodies of believers, to secure that, by this union with the immortal, man, too, may be a sharer in incorruption. He gives these gifts by virtue of the benediction through which He trans-elements the natural quality of these visible things to that immortal thing." Gregory of Nyssa, The Great Catechism, 37 (post A.D. 383).