I have always been a bit fascinated that at the last supper before the crucifixion that Jesus said then “this IS my body…” He had not even died yet.
He had just initiated the Apostles as his bishops and now he tured the Passover Feast into the first Eucharistic celebration. It was in anticipation of his death and resurrection, much like Mary’s Immaculate Conception was in anticipation of Christ’s death on the cross which redeemed her in her mother’s womb. We have to remember that Christ’s death is an eternal offering to the Father not just a one time event on earth.
In various NT verses we are told that all this happened before the foundation of the world:
Matt.13[35] This was to fulfil what was spoken by the prophet: “I will open my mouth in parables, I will utter what has been hidden since the foundation of the world.”
Matt.25[34] Then the King will say to those at his right hand, `Come, O blessed of my Father, inherit the kingdom prepared for you from the foundation of the world;
John.17[24] Father, I desire that they also, whom thou hast given me, may be with me where I am, to behold my glory which thou hast given me in thy love for me before the foundation of the world.
Eph.1[4] even as he chose us in him before the foundation of the world, that we should be holy and blameless before him.
Heb.4.[3] For we who have believed enter that rest, as he has said, “As I swore in my wrath,
`They shall never enter my rest,’” although his works were finished from the foundation of the world.
Heb.9[26] for then he would have had to suffer repeatedly since the foundation of the world. But as it is, he has appeared once for all at the end of the age to put away sin by the sacrifice of himself.
1Pet.1[20] He was destined before the foundation of the world but was made manifest at the end of the times for your sake.
Rev.13[8] and all who dwell on earth will worship it, every one whose name has not been written before the foundation of the world in the book of life of the Lamb that was slain.
Rev.17[8] The beast that you saw was, and is not, and is to ascend from the bottomless pit and go to perdition; and the dwellers on earth whose names have not been written in the book of life from the foundation of the world, will marvel to behold the beast, because it was and is not and is to come.