Commentaries
12:1-8 Here is a Divine prediction, which will be a heavy burden to all the enemies of the church. But it is for Israel; for their comfort and benefit. It is promised that God will make foolish the counsels, and weaken the courage of the enemies of the church. The exact meaning is not clear; but God often begins by calling the poor and despised; and in that day even the feeblest will resemble David, and be as eminent in courage and every thing good. Desirable indeed is it that the examples and labours of Christians should render them as fire among wood, as a torch in a sheaf, to kindle the flame of Divine love, to spread religion on the right hand and on the left.
8. Jerusalem, however, also shall be specially strengthened against the foe.
feeble … shall be as David—to the Jew, the highest type of strength and glory on earth (2Sa 17:8; 18:3; Joe 3:10).
angel of the Lord before them—the divine angel that went "before them" through the desert, the highest type of strength and glory in heaven (Ex 23:20; 32:34). "The house of David" is the "prince," and his family sprung from David (Eze 45:7, 9). David's house was then in a comparatively weak state.