(Reply to jfz178 post 81)
I believe that if you had real catholic (universal) faith, then there is no way you would make such a statement as ‘The rest of this is intellectual BS.’ Transubstantiation is a dogma, an article, of the Catholic faith; it is a truth that the Catholic Church has solemnly defined and proposed for our belief. In making an act of faith, we propose to believe all the truths which the Holy Catholic Church teaches (cf. act of faith in the Baltimore Catechism and Compendium to the CCC) guided as it is by the Holy Spirit whom Christ sent upon the Church to guide it to all truth. The truth of transubstantiation excludes the errors concerning Christ’s Real Presence in the eucharist such as pure symbolism, impanation, companation or what is also called consubstantiation. These errors revolve around the idea that no real change occurs in the bread and wine at the consecration of the Mass, i.e., the bread and wine after the consecration are substantially bread and wine just as before the consecration. The question can be asked 'Well, where is the true body and the true blood of Christ then which we believe to be present in the eucharist according to the very words of Jesus at the Last Supper and how did it get there? If nothing has changed in the bread and wine at the consecration then in what sense can we call the eucharist the body and blood of Christ when it is simply bread and wine? If one thinks that transubstantiation involves philosophical difficulties, one can only imagine the philosophical acrobatics employed in trying to make some philosophical sense of how the Real Presence of Christ’s true body and true blood are substantially present in what are substantially and simply bread and wine. A human body and human blood are not the same thing as bread and wine.
The Catholic Church professes, following the teaching of the early Church fathers and doctors (the faith handed down to us from them), that a real change occurs in the nature, essence, substance, or elements (as some fathers called it) of the bread and wine at the invocation of the word of God, i.e., the word of Christ who is God, as well as of the invocation of the Holy Spirit who came upon the Virgin Mary to fashion the body of the incarnate Christ. This change that occurs in the bread and wine at the consecration at Mass happens at the level of substance, it is a substantial change and so as the Church teaches it is fittingly called transubstantiation which means a change of the whole substance of the bread into the substance of the body of Christ and the whole substance of the wine into the substance of the blood of Christ.
You appear to suggest that the philosophical concepts of substance and accident are illogical, unsupportable concepts. Of course, not everyone would agree with you here including some of the greatest minds in the history of mankind. The Church itself uses the concept of substance in defining some of its dogmas such as the one under discussion here, transubstantiation, and we recite and profess every Sunday at Mass in the Niceno-Constantinopolitan Creed (381) that Jesus is consubstantial (of the same substance) with the Father.