These two last chapters are a moral address or confession—the whole moral history of Israel till they bow under the chastisement of God. The grace and presence of Christ brought out the full iniquity of chapter 7: 6. This forces the Remnant to look to the Lord as an only resource, and bow until He pleads—the only thing, if in anything fallen, we have to do.
Babylon bears a prominent place here; see verse 10, where we find this same cry of Psa. 42 and 43, compare also chapter 4: 9, 10.