II. They shall be victorious over their enemies, that would draw them from either their duty to God or their comfort in God (v. 5): They shall be as mighty men, that are both strong in body and bold in spirit, men of vigour, men of valour, effective men. Those of Ephraim, as well as those of Judah, shall be like a mighty man (v. 7), that dares to go about a difficult enterprise and is able to go through with it. They shall, as mighty men, tread down their enemies in the battle, as the dirt that is thrown out of the houses is trodden with other dirt in the mire of the streets. And they shall therefore fight, because the Lord is with them. Some would argue that they may therefore sit still, and do nothing, because the Lord is with them, who can and will do all. No; God's gracious presence with us to help us must not supersede, but quicken and animate, our endeavours to help ourselves; and we must therefore work out our salvation with fear and trembling, because it is God that works in us both to will and to do. They shall fight with readiness and resolution because, if God be with them, they are sure to be conquerors, more than conquerors. For then the riders on horses shall be confounded. The cavalry of the enemies shall be routed, and put into disorder, by the infantry of the Jews. The preachers of the gospel of Christ went forth to war a good warfare; they charged bravely, because God was with them; and the riders on horses that opposed them were confounded, for God chose the weak and foolish things of the world to confound the wise and mighty. But whence have they all this might? How come they to be so able, so active? It is in the Lord, and in the power of his might, that they are so (v. 6): I will strengthen the house of Judah, and so I will save the house of Joseph. Note, God saves us by strengthening us, and works out our happiness by working in us to do our duty. And thus we are engaged to the utmost diligence in using the strength God gives us; and yet, when all is done, God must have the glory of all. God is our strength, and so becomes both our song and our salvation.