What I find striking about the difference between what Roman Catholicism teaches about the Lord's Supper from Evangelicals and most Protestant denominations is that it's only the RCs who assert "their" priests and bishops alone have the "authority" to properly conduct the commemoration ordinance. They claim that without this authority there can be no true observance and, therefore, no spiritual value/grace is imparted to those who participate outside of the confines of the RCC.
The author will get into the propitiational aspect in the next part, but I think it's telling how Roman Catholicism has used this ordinance of the Lord to keep her members in line and afraid to consider other ways of viewing the historical observance. This is worth discussing, as well. We see no such restrictions demanded by the Apostles, only the general idea of what believers should so and why they should do it.
Just another example of them not following their own Bible.
Mark 9:38-40 New Revised Standard Version Catholic Edition (NRSVCE)
38 John said to him, “Teacher, we saw someone casting out demons in your name, and we tried to stop him, because he was not following us.” 39 But Jesus said, “Do not stop him; for no one who does a deed of power in my name will be able soon afterward to speak evil of me. 40 Whoever is not against us is for us.