“These men [heretics], however, deceive the people by the very Scriptures, that they may receive honors and praises at their hand, and that men may not turn to the truth…And to whom do they sell them, but to the devil? For if the Church be Christ’s sole and only one, who is it that carries off whatever is cut away from it, but that lion that roars and goes about, ‘seeking whom he may devour’ (1 Pet. 5:8)? Woe to them that are cut off from the Church! As for Her, She will remain entire. The Lord has made a scourge of small cords, and is admonishing them [heretics] to change themselves and be no longer traffickers; for if they will not change, they shall at the end hear it said, ‘Bind ye these men’s hands and feet, and cast them forth into outer darkness’ (Matt. 22:13).” - St. Augustine, “Tractate 10 on the Gospel of John” (§8)

You don't even really know where the Bible comes from or how the various NT books were compiled into the canon we have today. *le sigh, gg ez.