I offer as evidence the following passages of Scripture:
John 6:31-70
"31 Our fathers did eat manna in the desert, as it is written: He gave them bread from heaven to eat. 32 Then Jesus said to them: Amen, amen I say to you; Moses gave you not bread from heaven, but my Father giveth you the true bread from heaven. 33 For the bread of God is that which cometh down from heaven, and giveth life to the world. 34 They said therefore unto him: Lord, give us always this bread. 35 And Jesus said to them: I am the bread of life: he that cometh to me shall not hunger: and he that believeth in me shall never thirst.
36 But I said unto you, that you also have seen me, and you believe not. 37 All that the Father giveth to me shall come to me; and him that cometh to me, I will not cast out. 38 Because I came down from heaven, not to do my own will, but the will of him that sent me. 39 Now this is the will of the Father who sent me: that of all that he hath given me, I should lose nothing; but should raise it up again in the last day. 40 And this is the will of my Father that sent me: that every one who seeth the Son, and believeth in him, may have life everlasting, and I will raise him up in the last day.
41 The Jews therefore murmured at him, because he had said: I am the living bread which came down from heaven. 42 And they said: Is not this Jesus, the son of Joseph, whose father and mother we know? How then saith he, I came down from heaven? 43 Jesus therefore answered, and said to them: Murmur not among yourselves. 44 No man can come to me, except the Father, who hath sent me, draw him; and I will raise him up in the last day. 45 It is written in the prophets: And they shall all be taught of God. Every one that hath heard of the Father, and hath learned, cometh to me.
46 Not that any man hath seen the Father; but he who is of God, he hath seen the Father. 47 Amen, amen I say unto you: He that believeth in me, hath everlasting life. 48 I am the bread of life. 49 Your fathers did eat manna in the desert, and are dead. 50 This is the bread which cometh down from heaven; that if any man eat of it, he may not die.
51 I am the living bread which came down from heaven. 52 If any man eat of this bread, he shall live for ever; and the bread that I will give, is my flesh, for the life of the world. 53 The Jews therefore strove among themselves, saying: How can this man give us his flesh to eat? 54 Then Jesus said to them: Amen, amen I say unto you: Except you eat the flesh of the Son of man, and drink his blood, you shall not have life in you. 55 He that eateth my flesh, and drinketh my blood, hath everlasting life: and I will raise him up in the last day.
56 For my flesh is meat indeed: and my blood is drink indeed. 57 He that eateth my flesh, and drinketh my blood, abideth in me, and I in him. 58 As the living Father hath sent me, and I live by the Father; so he that eateth me, the same also shall live by me. 59 This is the bread that came down from heaven. Not as your fathers did eat manna, and are dead. He that eateth this bread, shall live for ever. 60 These things he said, teaching in the synagogue, in Capharnaum.
61 Many therefore of his disciples, hearing it, said: This saying is hard, and who can hear it? 62 But Jesus, knowing in himself, that his disciples murmured at this, said to them: Doth this scandalize you? 63 If then you shall see the Son of man ascend up where he was before? 64 It is the spirit that quickeneth: the flesh profiteth nothing. The words that I have spoken to you, are spirit and life. 65 But there are some of you that believe not. For Jesus knew from the beginning, who they were that did not believe, and who he was, that would betray him.
66 And he said: Therefore did I say to you, that no man can come to me, unless it be given him by my Father. 67 After this many of his disciples went back; and walked no more with him. 68 Then Jesus said to the twelve: Will you also go away? 69 And Simon Peter answered him: Lord, to whom shall we go? thou hast the words of eternal life. 70 And we have believed and have known, that thou art the Christ, the Son of God. "
Matthew 26:26-28
"26 And whilst they were at supper, Jesus took bread, and blessed, and broke: and gave to his disciples, and said: Take ye, and eat. This is my body. 27 And taking the chalice, he gave thanks, and gave to them, saying: Drink ye all of this. 28 For this is my blood of the new testament, which shall be shed for many unto remission of sins. "
Mark 14:22-24
"22 And whilst they were eating, Jesus took bread; and blessing, broke, and gave to them, and said: Take ye. This is my body. 23 And having taken the chalice, giving thanks, he gave it to them. And they all drank of it. 24 And he said to them: This is my blood of the new testament, which shall be shed for many."
Luke 22:17-20
"17 And having taken the chalice, he gave thanks, and said: Take, and divide it among you: 18 For I say to you, that I will not drink of the fruit of the vine, till the kingdom of God come. 19 And taking bread, he gave thanks, and brake; and gave to them, saying: This is my body, which is given for you. Do this for a commemoration of me. 20 In like manner the chalice also, after he had supped, saying: This is the chalice, the new testament in my blood, which shall be shed for you."
Luke 24:30-35
"30 And it came to pass, whilst he was at table with them, he took bread, and blessed, and brake, and gave to them.
31 And their eyes were opened, and they knew him: and he vanished out of their sight. 32 And they said one to the other: Was not our heart burning within us, whilst he spoke in this way, and opened to us the scriptures? 33 And rising up, the same hour, they went back to Jerusalem: and they found the eleven gathered together, and those that were staying with them, 34 Saying: The Lord is risen indeed, and hath appeared to Simon.
35 And they told what things were done in the way; and how they knew him in the breaking of the bread. "
1st Corinthians 10:16-17
"16 The chalice of benediction, which we bless, is it not the communion of the blood of Christ? And the bread, which we break, is it not the partaking of the body of the Lord? 17 For we, being many, are one bread, one body, all that partake of one bread."
1st Corinthians 11:23-30
"23 For I have received of the Lord that which also I delivered unto you, that the Lord Jesus, the same night in which he was betrayed, took bread. 24 And giving thanks, broke, and said: Take ye, and eat: this is my body, which shall be delivered for you: this do for the commemoration of me. 25 In like manner also the chalice, after he had supped, saying: This chalice is the new testament in my blood: this do ye, as often as you shall drink, for the commemoration of me.
26 For as often as you shall eat this bread, and drink the chalice, you shall shew the death of the Lord, until he come. 27 Therefore whosoever shall eat this bread, or drink the chalice of the Lord unworthily, shall be guilty of the body and of the blood of the Lord. 28 But let a man prove himself: and so let him eat of that bread, and drink of the chalice. 29 For he that eateth and drinketh unworthily, eateth and drinketh judgment to himself, not discerning the body of the Lord. 30 Therefore are there many infirm and weak among you, and many sleep. "
If there is no real presence in the Eucharist, then how can St.Paul warn us not to take it unworthily lest we become guilty of the body and blood of the Lord? That "spiritualization" makes complete nonsense not only of the 6th chapter of John, but of 1st Corinthians 10:16-17 "16 The chalice of benediction, which we bless, is it not the communion of the blood of Christ? And the bread, which we break, is it not the partaking of the body of the Lord? 17 For we, being many, are one bread, one body, all that partake of one bread."
Now, how can one become guilty of the body and blood of the Lord IF THAT BODY AND BLOOD OF THE LORD IS NOT REALLY THERE? Now if I make a symbol of a person and then I decide to do bad things to that symbol. I may indeed be guilty of abusing that symbol of the person, but am I guilty of his body and blood? Silly question...of course not! Why? BECAUSE THAT PERSON IS NOT REALLY PRESENT IN THAT SYMBOL is he?
There is the the whole case for why the Eucharist really is the presence of Our Lord Jesus Christ...body and blood, soul and divinity.
Catholics! You have the greatest miracle of all at every Mass that you participate in. BE THERE!
Pax Domini sit semper vobiscum,
In addition to these passages of the New Testament I would also like to add this very clear quote from St. Ignatius of Antioch, who was a close friend and disciple of St. John the evangelist , the bishop of Antioch and a martyr for the faith.
CHAP. VII.--LET US STAND ALOOF FROM SUCH HERETICS.
They abstain from the Eucharist and from prayer,(7) 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. Those, therefore, who speak against this gift of God, incur death(11) in the midst of their disputes. But it were better for them to treat it with respect,(13) that they also might rise again. It is fitting, therefore, that ye should keep aloof from such persons, and not to speak of(15) them either in private or in public, but to give heed to the prophets, and above all, to the Gospel, in which the passion[of Christ] has been revealed to us, and the resurrection has been fully proved.(16) But avoid all divisions, as the beginning of evils.
The Epistle of Ignatius to the SmyrnaeansBlackie