This topic is discussed below on another thread. What I have written is what the Church teaches. Read it and the posts I have indicated. The main point to stress is that the whole Sacrament is a Miracle and a Mystery beyond our human understanding. Stress that what is received is the Whole living Christ as we will see Him in Heaven. And we receive Him in His glorified body not in His material, earthly matter. The difference is that His glorified body is " spiritual. " That is His physical body is not restricted by the material laws of the physical universe, He can pass right through walls, doors, etc and go where He wants simply by the thought.
His Presence wherever the consecrated species exists is a Miracle. It is a Necessary Miracle since we are dealing with the whole world where Mass is celebrated and where people are receiving simultaneously. This would not be possible without a Miracle of Christ's. If this Miracle did not take place, the consecration could only take place in one Mass at a time. This would mean that most people in the world whould never be abe to receive the Sacrament.
" Re: Problem with Transubstantiation
Attention all: This Sacrament is the Center of Our Lives as Catholics
Let's get it right!
As faithful Catholics we are to believe with a Catholic faith all that is contained in the Catechism of the Catholic Church. This is our sure and principle guide to the Truth of Christ as guaranteed by the Holy Spirit who guides the Magisterium to all Truth in matters of Faith and Morals. The Scriptures are our guide only as interpreted by the Magisterium of the Church. In seeking to understand the Mysteries of the Faith we depend on the Magisterium of the Church over all else.
The teaching on Transubstantiation is quite clear in the Catechism.
At the consecration. the substances of the bread and wine ( and their forms as St. Thomas teaches) ares changed into the Whole Christ, body, blood, human nature ( his human body and soul) and Divine nature in the one Person of Christ, the Second Person of the Trinity.
The accidents of bread and wine are present but inhering in no substance - not in the substance of Christ nor in the substance of the bread and wine which have been changed into the body and blood of Christ.That the accidents can be present without a subject is another Miracle, because accidents, except this instance, require a subject in which to inhere. But more Miracles are coming!!
Christ is not present in the accidents but behind the accidents. Or you may think of the accidents as a " veil " covering the Holy of Holies as in the Temple of Jerusalem before Christ's Crucifixion.
By defined teaching we also know that the Whole Christ is fully present in each particle of the bread or each drop of the wine which may be distributed and received bit by bit or drop by drop. We also know He is present in every consecrated host and cup at the same instant at any consecration occurring any where in the world at that moment and in each communicant throughout the world receiving at the same moment, or as He is reserved in every tabernacle throughout the world. These are obvious miracles. It is a Sacrament underscored by many miracles.
St. Thomas teaches what we mean by the Whole Christ and how He is present in even a single crumb or drop of the species. By the Whole Christ we mean His entire glorified body - limbs, parts and all bodily features and quantity as well. And these he explains are present " after the manner of the Sacrament. " This means His body is present in whatever manner is demanded by the type, dimensions and quantity of the species. But another factor may be at work as well and that is the Impassibility of Christs' glorified body.
Christ is Present in the Sacrament in the same Glorified body He has at the Right Hand of the Father. It is a body impassible, that is it is not subject to the limitations of a body in our physical, limited, material world. As proven by Christ's Resurrection and His presence among the Apostles the forty days before his Ascension, His body was not subject to the restrictions of physical matter existing in our material, limited world, as he could pass through walls and doors, eat or not eat, drink or not drink as he pleased. This Impassibility my account for some or all of the miracles of Christ's Real Presence after the consecration.
It is important to keep all these things in mind when discussing the Eucharist. "
Also read posts 36, 51, 112, 113 in the same thread.