The following is from a sermon on wives and marriage:
So for example of a priest who undertakes to do his priestly work, that is, to consecrate the Lord's Body, and knows not the manner nor the words of consecration, how would you hold this man excused? If, indeed, he sins even in that he does not as he should. Hear now what befel once upon a time; for this is to our present point. There were two priests who spake together, and one said unto the other, "How do you say the words of consecration for Christ's Body? "I" (said the other) "I say Hoc est Corpus meum" Then began they to dispute one with other: "You say not well"-"Nay, it is you who says ill"-and, as they disputed thus, there came another priest to whom they told the whole matter, and who said: "Neither one of you says well, nor the other, for the true words are Hoc est corpusso meusso": and proceeded by demonstration: "You see how he says corpusso, wherefore the adjective should be meusso; therefore (I say) henceforth say you nothing else but: Hoc est corpusso meusso." To which speech the others consented not: wherefore they accorded together to a parish priest near by, going to him of set purpose and laying the case before him. Then the parish priest answering "Ha, what needs all this ado? I go to it right simply; I say an Ave Maria over the Host!" - Now, I ask you, are these men excused? See you not that they make men adore a God a mere piece of bread? Be sure that each of them commits a most deadly sin, seeing that it was their bounden duty to do after the manner which Jesus Christ has ordained to Holy Church. So I say also that, whatever a man does, it is his bounden duty to know all that pertains to that thing.
Alas, I fear we live in an age of corpusso meusso.