(2.) He undertakes the war purely out of his own zeal. It is in his anger, it is in his fury, that he treads down his enemies (v. 3), and that fury upholds him and carries him on in this enterprise, v. 5. God wrought salvation for the oppressed Jews purely because he was very angry with the oppressing Babylonians, angry at their idolatries and sorceries, their pride and cruelty, and the injuries they did to his people, and, as they increased their abominations and grew more insolent and outrageous, his anger increased to fury. Our Lord Jesus wrought out our redemption in a holy zeal for the honour of his Father and the happiness of mankind, and a holy indignation at the daring attempts Satan had made upon both; this zeal and indignation upheld him throughout his whole undertaking. Two branches there were of this zeal that animated him:—[1.] He had a zeal against his and his people's enemies: The day of vengeance is in my heart (v. 4), the day fixed in the eternal counsels for taking vengeance on them; this was written in his heart, so that he could not forget it, could not let it slip; his heart was full of it, and it lay as a charge, as a weight, upon him, which made him push on this holy war with so much vigour. Note, There is a day fixed for divine vengeance, which may be long deferred, but will come at last; and we may be content to wait for it, for the Redeemer himself does so, though his heart is upon it. [2.] He had a zeal for his people, and for all that he designed to make sharers in the intended salvation: "The year of my redeemed has come, the year appointed for their redemption." There was a year fixed for the deliverance of Israel out of Egypt, and God kept time to a day (Exod. xii. 41); so there was for their release out of Babylon (Dan. ix. 2); so there was for Christ's coming to destroy the works of the devil; so there is for all the deliverances of the church, and the deliverer has an eye to it. Observe, First, With what pleasure he speaks of his people; they are his redeemed; they are his own, dear to him. Though their redemption is not yet wrought out, yet he calls them his redeemed, because it shall as surely be done as if it were done already. Secondly, With what pleasure he speaks of his people's redemption; how glad he is that the time has come, though he is likely to meet with a sharp encounter. "Now that the year of my redeemed has come, Lo, I come; delay shall be no longer. Now will I arise, saith the Lord. Now thou shalt see what I will do to Pharaoh." Note, The promised salvation must be patiently waited for till the time appointed comes; yet we must attend the promises with our prayers. Does Christ say, Surely I come quickly; let our hearts reply, Even so come; let the year of the redeemed come.