2. He engaged his own strength and righteousness for them. They shall be saved, notwithstanding all this; and, (1.) Because they have no strength of their own, nor any active men that will set to it in good earnest to redress the grievances either of their iniquities or of their calamities, therefore his own arm shall bring salvation to him, to his people, or to him whom he would raise up to be the deliverer, Christ, the power of God and arm of the Lord, that man of his right hand whom he made strong for himself. The work of reformation (that is the first and principal article of the salvation) shall be wrought by the immediate influences of the divine grace on men's consciences. Since magistrates and societies for reformation fail of doing their part, one will not do justice nor the other call for it, God will let them know that he can do it without them when his time shall come thus to prepare his people for mercy, and then the work of deliverance shall be wrought by the immediate operations of the divine Providence on men's affections and affairs. When God stirred up the spirit of Cyrus, and brought his people out of Babylon, not by might, nor by power, but by the Spirit of the Lord of hosts, then his own arm, which is never shortened, brought salvation. (2.) Because they have no righteousness of their own to merit these favours, and to which God might have an eye in working for them, therefore his own righteousness sustained him and bore him out in it. Divine justice, which by their sins they had armed against them, through grace appears for them. Though they can expect no favour as due to them, yet he will be just to himself, to his own purpose and promise, and covenant with his people: he will, in righteousness, punish the enemies of his people; see Deut. ix. 5. Not for thy righteousness, but for the wickedness of these nations they are driven out. In our redemption by Christ, since we had no righteousness of our own to produce, on which God might proceed in favour to us, he brought in a righteousness by the merit and mediation of his own Son (it is called the righteousness which is of God by faith, Phil. iii. 9), and this righteousness sustained him, and bore him out in all his favours to us, notwithstanding our provocations. He put on righteousness as a breast-plate, securing his own honour, as a breast-plate does the vitals, in all his proceedings, by the justice and equity of them; and then he put a helmet of salvation upon his head; so sure is he to effect the salvation he intends that he takes salvation itself for his helmet, which therefore must needs be impenetrable, and in which he appears very illustrious, formidable in the eyes of his enemies and amiable in the eyes of his friends. When righteousness is his coat of arms, salvation is his crest. In allusion to this, among the pieces of a Christian's armour we find the breast-plate of righteousness, and for a helmet the hope of salvation (Eph. vi. 14-17; 1 Thess. v. 8), and it is called the armour of God, because he wore it first and so fitted it for us. (3.) Because they have no spirit or zeal to do any thing for themselves, God will put on the garments of vengeance for clothing, and clothe himself with zeal as a cloak; he will make his justice upon the enemies of his church and people, and his jealousy for his own glory and the honour of religion and virtue among men, to appear evident and conspicuous in the eye of the world; and in these he will show himself great, as a man shows himself in his rich attire or in the distinguishing habit of his office. If men be not zealous against sin, God will, and will take vengeance on it for all the injury it has done to his honour and his people's welfare; and this was the business of Christ in the world, to take away sin and be revenged on it.