From Liguori:
https://www.religiousbookshelf.com/meditations-and-readings/day/2154-Holy-Thursday.html
“Do this in commemoration of me. (Luke xxii. 19). St. Thomas says that the Redeemer left us the Most Blessed Sacrament that we may ever remember the blessings He has obtained for us, and the love He showed us in dying for us. And hence the Blessed Eucharist is called by the same holy Doctor Passionis Memoriale, a memorial of the Passion.”
Take note. A MEMORIAL OF HIS PASSION. How may of us grew up hearing that Mass was our “communal meal” without ever hearing that this is Christ’s Passon re-presented to us? I thank God every day He brought me to Tradition.
Harvey Millican's Blog: Musings of a Trad Dad 