I'm sure St. Cyril knew the complete verse:2Thes:2:15: "Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle". (KJV)
I am sure he did know the verse!
So can you mention some of these traditions you were commanded to stand fast in?
There is a list of these oral traditions, correct?
Excellent argument. Yeah, there’s a list. Go see the Book of Concord.
Linked to at post #33.