Whenever I think of the Last Supper since my reversion to the Church a quarter century ago, I recall the EWTN Daily Mass homilies which taught me so much back then I hadn’t known from my 9 years of Catholic school education and 4 more years of CCD. Chiefly: that the Mass is the “Re-presentation (or ‘presentation again,’ if you think that ‘re-presentation’ might be construed as ‘representation,’) of the Last Supper and the continuation of the sacrifice on Calvary in an unbloodied manner.” When you are at Mass, it is af if you are at the Last Supper when it was first celebrated, and it is as if you are on Calvary with Jesus and Mary (and St. John the Evangelist and the other Marys.)
I think that if this truth was beaten into the heads of seminarians studying for the priesthood, as well as the laity by proper catechesis, the Mass would be different. You would see priests holding true to the rubrics of the Mass (proper form and function matters and insisting on that does not make you a Catholic Pharisee) and the laity acting with reverence. It would be obvious that everyone present is aware of the real Presence of Jesus in the Eucharist: that the Eucharist is not a symbol, but really, truly is Jesus’ Boby, Blood, Soul, and Divinity in the form of bread and wine (this was the other thing that EWTN Daily Mass homilies taught me that I hadn’t known from Catholic schooling; or, to be fair, if it was taught, not really emphasized.)

My two other books are still available! "The Stations of the Cross for Alcoholics" and "The Recovery Rosary: Reflections for Alcoholics and Addicts" (Thank you!!)