It was on the eve of his Passion that Jesus together with his  disciples celebrated this meal with its multiple meanings. This is the context  in which we must understand the new Passover which he has given to us in the  Blessed Eucharist.
There is an apparent discrepancy in the Evangelists' accounts,  between John's Gospel on the one hand, and what on the other Mathew, Mark and  Luke tell us.
According to John, Jesus died on the Cross at the very moment  when the Passover lambs were being sacrificed in the temple. The death of Jesus  and the sacrifice of the lambs coincided.
However, this means that he must have died the day before Easter and could not,  therefore, have celebrated the Passover meal in person - this, at any rate, is  how it appears.
According to the three Synoptic Gospels, the Last Supper of  Jesus was instead a Passover meal into whose traditional form he integrated the  innovation of the gift of his Body and Blood.
This contradiction seemed unsolvable until a few years ago. The  majority of exegetes were of the opinion that John was reluctant to tell us the  true historical date of Jesus' death, but rather chose a symbolic date to  highlight the deeper truth:  Jesus is the new, true Lamb who poured out his  Blood for us all.
In the meantime, the discovery of the [Dead Sea] Scrolls at  Qumran has led us to a possible and convincing solution which, although it is  not yet accepted by everyone, is a highly plausible hypothesis. We can now say  that John's account is historically precise.
Jesus truly shed his blood on the eve of Easter at the time of  the immolation of the lambs.
In all likelihood, however, he celebrated the Passover with his disciples in  accordance with the Qumran calendar, hence, at least one day earlier; he  celebrated it without a lamb, like the Qumran community which did not recognize  Herod's temple and was waiting for the new temple.
Consequently, Jesus celebrated the Passover without a lamb - no,  not without a lamb:  instead of the lamb he gave himself, his Body and his Blood.  Thus, he anticipated his death in a manner consistent with his words:  "No one  takes [my life] from me, but I lay it down of my own accord" (Jn 10: 18).
At the time when he offered his Body and his Blood to the  disciples, he was truly fulfilling this affirmation. He himself offered his own  life. Only in this way did the ancient Passover acquire its true meaning.
In his Eucharistic catecheses, St John Chrysostom once wrote:   Moses, what are you saying? Does the blood of a lamb purify men and women? Does  it save them from death? How can the blood of an animal purify people, save  people or have power over death? In fact, Chrysostom continues, the immolation  of the lamb could be a merely symbolic act, hence, the expression of expectation  and hope in One who could accomplish what the sacrifice of an animal was  incapable of accomplishing.
The Lamb and Temple
Jesus celebrated the Passover without a lamb and without a  temple; yet, not without a lamb and not without a temple. He himself was the  awaited Lamb, the true Lamb, just as John the Baptist had foretold at the  beginning of Jesus' public ministry: "Behold, the Lamb of God, who takes away  the sin of the world!" (Jn 1: 29).
And he himself was the true Temple, the living Temple where God  dwells and where we can encounter God and worship him. His Blood, the love of  the One who is both Son of God and true man, one of us, is the Blood that can  save. His love, that love in which he gave himself freely for us, is what saves  us. The nostalgic, in a certain sense, ineffectual gesture which was the  sacrifice of an innocent and perfect lamb, found a response in the One who for  our sake became at the same time Lamb and Temple.
Thus, the Cross was at the centre of the new Passover of Jesus.  From it came the new gift brought by him, and so it lives on for ever in the  Blessed Eucharist in which, down the ages, we can celebrate the new Passover  with the Apostles.
From Christ's Cross comes the gift. "No one takes [my life] from  me, but I lay it down of my own accord". He now offers it to us.
The paschal haggada, the commemoration of God's saving  action, has become a memorial of the Cross and Resurrection of Christ - a  memorial that does not simply recall the past but attracts us within the  presence of Christ's love.
Thus, the berakah, Israel's prayer of blessing and  thanksgiving, has become our Eucharistic celebration in which the Lord blesses  our gifts - the bread and wine - to give himself in them.
Let us pray to the Lord that he will help us to understand this marvellous  mystery ever more profoundly, to love it more and more, and in it, to love the  Lord himself ever more.
Let us pray that he will increasingly draw us to himself with  Holy Communion. Let us pray that he will help us not to keep our life for  ourselves but to give it to him and thus to work with him so that people may  find life:  the true life which can only come from the One who himself is the  Way, the Truth and the Life. Amen.