1. He will give them cause to do so. For, (1.) They shall enjoy a long uninterrupted course of prosperity: I will extend, or am extending, peace to her (that is, all good to her) like a river that runs in a constant stream, still increasing till it be swallowed up in the ocean. The gospel brings with it, wherever it is received in its power, such peace as this, which shall go on like a river, supplying souls with all good and making them fruitful, as a river does the lands it passes through, such a river of peace as the springs of the world's comforts cannot send forth and the dams of the world's troubles cannot stop nor drive back nor its sand rack up, such a river of peace as will carry us to the ocean of boundless and endless bliss. (2.) There shall be large and advantageous additions made to them: The glory of the Gentiles shall come to them like a flowing stream. Gentiles converts shall come pouring into the church, and swell the river of her peace and prosperity; for they shall bring their glory with them; their wealth and honour, their power and interest, shall all be devoted to the service of God and employed for the good of the church: "Then shall you suck from the breasts of her consolations. When you see such crowding for a share in those comforts you shall be the more solicitous and the more vigorous to secure your share, not for fear of having the less for others coming in to partake of Christ" (there is no danger of that; he has enough for all and enough for each), "but their zeal shall provoke you to a holy jealousy." It is well when it does so, Rom. xi. 14; 2 Cor. ix. 2. (3.) God shall be glorified in all, and that ought to be more the matter of our joy than any thing else (v. 14): The hand of the Lord shall be known towards his servants, the protecting supporting hand of his almighty power, the supplying enriching hand of his inexhaustible goodness; the benefit which his servants have by both these shall be known to his glory as well as theirs. And, to make this the more illustrious, he will at the same time make known his indignation towards his enemies. God's mercy and justice shall both be manifested and for ever magnified.