Jeremias 9
Theodoret of Cyrus · Comentário Patrístico (catena)
Jeremias 9:3
They were fabricating deceit, engaging in blackmail, leveling false accusations against neighbors. For this is what he says, "Deceit, not faith, prevails over the land, for they proceed from evil to evil." Because of this he exposes their evil, which never changes as they move "from evil to evil," immediately adding the reason they neglect the divine law: because "they do not know me, says the Lord." — ON JEREMIAH 3:9
Jeremias 9:21-22
By "windows" he refers to the error of their thinking: through them they gave entrance to the error and the blow inflicted by it. You would not be wide of the mark to call the body's senses "windows"—sight, taste, smell, hearing and touch. Both life and death can enter through these. For example, the person who looks with restraint reaps life, while the one looking immoderately gains death. The truthful tongue procures salvation for the soul, while the lying one brings about ruin; and likewise with the rest, as you can easily learn. — ON JEREMIAH 3:9.21
Jeremias 9:25-26
The ancient Scriptures therefore teach the benefit of spiritual circumcision and that bodily circumcision makes no difference. For it is not the Gentiles who are accused of being uncircumcised but the Jews, who were physically circumcised but whose heart was uncircumcised. — ON JEREMIAH 3:9