Commentaries
30:12-17 When God is against a people, who will be for them? Who can be for them, so as to do them any kindness? Incurable griefs are owing to incurable lusts. Yet, though the captives suffered justly, and could not help themselves, the Lord intended to appear for them, and to punish their oppressors; and he will still do so. But every effort to heal ourselves must prove fruitless, so long as we neglect the heavenly Advocate and sanctifying Spirit. The dealings of His grace with every true convert, and every returning backslider, are the same in effect as his proceedings to the Jews.
17. (Jer 8:22; 33:6).
Outcast—as a wife put away by her husband (Isa 62:4, contrasted with Jer 30:12).
Zion—alluding to its Hebrew meaning, "dryness"; "sought after" by none, as would be the case with an arid region (Isa 62:12). The extremity of the people, so far from being an obstacle to, will be the chosen opportunity of, God's grace.