For he put on righteousness as a breastplate, and an {q} helmet of salvation upon his head; and he put on the garments of vengeance for clothing, and was clad with zeal as a cloke.

(q) Signifying that God has all means at hand to deliver his Church and to punish their enemies.

Wesley's Notes

59:17 For - God, resolving to appear as a man of war, puts on his arms; he calls righteousness his breast - plate, to shew the justness of his cause, as also his faithfulness in making good his promises. Vengeance - Or garments made of vengeance: as God is said to put on the former for their sakes, whom he would preserve, so he puts on these for their sakes, whom he will destroy, namely, his peoples enemies. Zeal - For his own honour, and for his own people. The sum of all these expressions is, to describe both the cause and effect together; the cause was righteousness and zeal in God, the effect, salvation to his people, and vengeance on his enemies.

Jamieson-Fausset-Brown Bible Commentary

17. Messiah is represented as a warrior armed at all points, going forth to vindicate His people. Owing to the unity of Christ and His people, their armor is like His, except that they have no "garments of vengeance" (which is God's prerogative, Ro 12:19), or "cloak of zeal" (in the sense of judicial fury punishing the wicked; this zeal belongs properly to God, 2Ki 10:16; Ro 10:2; Php 3:6; "zeal," in the sense of anxiety for the Lord's honor, they have, Nu 25:11, 13; Ps 69:9; 2Co 7:11; 9:2); and for "salvation," which is of God alone (Ps 3:8), they have as their helmet, "the hope of salvation" (1Th 5:8). The "helmet of salvation" is attributed to them (Eph 6:14, 17) in a secondary sense; namely, derived from Him, and as yet only in hope, not fruition (Ro 8:24). The second coming here, as often, is included in this representation of Messiah. His "zeal" (Joh 2:15-17) at His first coming was but a type of His zeal and vengeance against the foes of God at His second coming (2Th 1:8-10; Re 19:11-21).

Matthew Henry's Concise Commentary

59:16-21 This passage is connected with the following chapters. It is generally thought to describe the coming of the Messiah, as the Avenger and Deliverer of his church. There was none to intercede with God to turn away his wrath; none to interpose for the support of justice and truth. Yet He engaged his own strength and righteousness for his people. God will make his justice upon the enemies of his church and people plainly appear. When the enemy threatens to bear down all without control, then the Spirit of the Lord shall stop him, put him to flight. He that has delivered, will still deliver. A far more glorious salvation is promised to be wrought out by the Messiah in the fulness of time, which all the prophets had in view. The Son of God shall come to us to be our Redeemer; the Spirit of God shall come to be our Sanctifier: thus the Comforter shall abide with the church for ever, Joh 14:16. The word of Christ will always continue in the mouths of the faithful; and whatever is pretended to be the mind of the Spirit, must be tried by the Scriptures. We must lament the progress of infidelity and impiety. But the cause of the Redeemer shall gain a complete victory even on earth, and the believer will be more than conqueror when the Lord receives him to his glory in heaven.