Observe the marks of a robber. First, that he does not enter openly. Second, he does not enter according to the Scriptures, for this is, “not by the door.” Here also, Jesus refers to those who had been before and to those who would come after him: antichrist and the false christs, Judas and Theudas, and whoever else there have been of the same kind. 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 ...