Zechariah 12:5 - Albert Barnes' Notes on the Bible

And the princes of Judah - He pictures the onemindedness of the Church. No one shall assume anything to himself; each shall exalt the strength which the other was to him; but all, “in the Lord. The princes of Judah” shall say “in their heart,” not outwardly or politically, but in inward conviction, “strength to me” (all speak as one) “are the inhabitants of Jerusalem in the Lord of hosts their God.” The highest in human estimation acknowledge that their strength is in those who are of no account in this world; as, in fact the hearts of the poor are evermore the strength of the Church; but that, “in the Lord of hosts;” in Him, in whose hands are the powers of heaven and earth, over against the petty turmoil on earth. God had chosen Jerusalem Zechariah 1:17; Zechariah 2:12; Zechariah 3:2; therefore she was invincible. “That most glorious prince of Judah, Paul, said, ‘I can do all things in Christ who instrengtheneth me. ‘“