And he rightly calls the Scriptures "a door," for they bring us to God and open to us the knowledge of God. They make us his sheep. They guard us and do not let the wolves come in after us.
For Scripture, like some sure door, bars the passage against the heretics, placing us in a state of safety as to all that we desire and not allowing us to wander.
And, if we do not undo Scripture, we shall not easily be conquered by our enemies. By Scripture we can know all, both those who are and those who are not shepherds.
-- St. John Chrysostom, cited in Ancient Christian Commentary: John. HT: Pr. ZIP