The Sacrament of the Eucharist was promised by Jesus in John.6, and Jesus instituted it on the Last Supper on Holy Thursday, giving the order to his disciples to do it:
    "He took bread, and when he had given thanks, he broke it and gave it to his disciples, saying: "take it and eat, this is my body; do this in memory of me". Then he took a cup, gave thanks, and gave it to them, saying, "drink from it, all of you, for this is my blood of the new and everlasting covenant, which will be shed on behalf of many for the forgiveness of sins . Do this, as often as you drink it, in memory of me. For as often as you eat this bread and drink this cup, you proclaim the death of the Lord until he comes" (Matt.26:26-28, Mr.14:22-24, Luk.22:19-20, 1Cor.11:24-26). 

    The Holy Mass is a little like Psalm 22:
   The first 22 verses is Jesus crucified, with 13 prophecies fulfilled to the letter in Jesus at Calvary... but all of a sudden, in verse 23 (or 22 in other Bibles), the crucified appears in the midst of the assembly praising the name of God, until the end of the Psalm...
    ... The Mass is something similar: Up to the Communion it is Jesus sacrificed, with his blood separated from his flesh, but all of a sudden, in the Communion, the same Jesus sacrificed is now alive in the heart of every Christian who received him, alleluia!... and that's why John Paul II refers usually to it as "the celebration", praise the Lord!, always with thanksgiving for being my prisoner of Love.

    ... In the Consecration, if the body and the blood are separated, there is a "sacrifice", the sacrifice of the New Covenant, the Body and Blood of our Lord Jesus Christ... as "real" as he was "real" as a little humble boy in Bethlehem, and as "real" as he was real as a despised man crucified at Calvary... and now, even more humble that at Bethlehem!... but he is the same Lord of the Universe... in Bethlehem, like a little humble boy; in the Eucharist, just like wine and bread!.

Christ's One Sacrifice:   

    The Holy Sacrifice of the Mass is not the repetition of what happened at Calvary, rather, it is the greatest miracle of God of time and space, it is exactly as if you were at Calvary on the first Good Friday of the history of humanity, the same sacrifice of Calvary done only once, because "Christ was offered once to bear the sins of mankind" (Heb.9:28)... we have to be at Mass just as if we were at Calvary on Good Friday with Mary and John. I like to hold my Rosary during Mass, to remind myself that I am with Mary at Calvary accompanying her, and to ask her to help me to understand and love the Holy Sacrifice of the Mass.

    Jesus Christ is truly present, Body, Blood, Soul, and Divinity in His Glorified Body in the Eucharist.
    The Sacrifice of the Mass is not a re-sacrifice of Jesus Christ, for such a thing is an impossible blasphemy (Heb.9:12,27, 10:14), but rather, through the separate consecration of bread into His Flesh and wine into His Blood, Jesus Christ presents Himself in His glorified Body to God, in atonement for our sins and the sins of the whole world. The Eucharistic Celebration is thus one single sacrifice with the sacrifice of Christ because it makes present the sacrifice of the Cross, because it is its memorial, and because it applies the fruit of the Cross.
    Through the Mass, the sufferings of every member of the Body of Christ are united with the sufferings of Christ on the Cross, and all with the glory of every member of the Body of Christ in heaven, made glorious by Christ. The entire heavenly portion of the Body of Christ, angels and saints, is present at every Mass, celebrating the mystery in which God gave each of them a part (Rev.5:6-14).   

The Eternal Sacrifice:

    The Sacrifice of the Mass is the "eternal and permanent sacrifice" of Num.28:1-6 and Ex.29:38-43... if it is "permanent", is got to be now, and it is!, in the daily Holy Sacrifice of the Eucharist, and not only twice a day as in Num.28, but over 500,000 times a day, every day!... and if it is "eternal", is got to be eternally in Heaven, and it is!, "the lamb standing, like slaughtered" of Rev.5:6, just in the center of the Throne of Heaven, the reason of all praise and joy and singing of the saved for an eternity.

    The Eucharist, the Perpetual Sacrifice, will be abolished when the "Antichrist" comes ( Mat.24:15, Dan.8:11, 9:27, 11:31, 12:11)... it is a pity that for many Christian churches, the Antichrist has already come (1Jn.4:3)... they already do not have the daily sacrifice, the regular burnt offering... no altar, no priest, no tabernacle...

    I don't know how the Jews can understand Psalm 2 when God says: "You are my son... you shall brake them with a rod of iron, and shatter them in pieces like a potter's vessel" (Ps.2:7,9). I understand it reading the Book of Revelation when it says, "the Son of Man... out of his mouth came a sharp sword, double-edged" (Rev.1:13,16)... the "sword" is the love of God, and the two edges are his "suffering" in the Cross, and his "humility" in the Eucharist. The "rod of iron" is his love in the Cross and in the Eucharist, day by day. From the humble throne of the Eucharist he is shattering into pieces our pride, day by day, and now, at the wake of the Third Millennium, without noise, we are already 2 billion Christians all over the world!.

The immense value of the Eucharist:

    - Only one Holy Sacrifice of the Mass is worth more "adoration" to God than all human beings prostrated for one year!, because it is Christ, God offered, with an infinite value!... I adore you my God.

    - Only one Holy Sacrifice of the Mass has more "thanksgiving" value than all the angels praising God for all eternity!... it is an infinity value of thanksgiving!... thank you, my sweet prisoner of Love.

    - Only one Holy Sacrifice of the Mass has more penitential value than all the monks of all times making penance at the same time!... praise be my Lord and my God, Jesus Christ... it is the main source to bring souls out of Purgatory

    - Only one Holy Sacrifice of the Mass has more value of "petition" to God, than all humans and Angels and Saints praying together for a sick person!... it is God!... glory to you Jesus, my love and my all!.

    - Only one Holy Sacrifice of the Mass!...

    ...And now you can have it... free... go and receive Him... daily... discerning!... when the final Antichrist comes it will be very difficult to find it!. Now the Holy Mass is celebrated 500.000 times daily all over the world. When I went to Japan, I thought it would be difficult, and it came out very easy: Just across the Japanese Garden of the Hotel there was the Church of St. Francis Xavier. In all my trips abroad I have received the Eucharist daily: In Communist China, India, Africa, North, Central and South America, in Australia, in Communist Russia, Poland and Yugoslavia, and all Europe... it's so available, and so free!... let's receive Him daily... every day!... He is madly in love with us!... come, my sweet Jesus, live in me, be my daily bread, to nourish others with my crosses. Thank you my Love.