Ephraim (the ten tribes) is weeping for sin. He is angry at himself for his sin, and folly, and frowardness. He finds he cannot, by his own power, keep himself close with God, much less bring himself back when he is revolted.
Therefore he prays, Turn thou me, and I shall be turned. His will was bowed to the will of God. When the teaching of God's Spirit went with the corrections of his providence, then the work was done. This is our comfort in affliction, that the Lord thinks upon us.
God has mercy in store, rich mercy, sure mercy, suitable mercy, for all who seek him in sincerity.