by John Calvin
And he will lift up an ensign to the nations. This verse contains nothing more than the explanation of the former verse. The language is metaphorical, and admits of two meanings; either that, by giving an ensign, he will terrify adversaries, so that they will not dare to prevent his people from returning, or that he will give an ensign to the wretched exiles not to hesitate to make preparations for their return. But even at the present day this doctrine is highly useful among us; for as an ensign is lifted up in the army, that the soldiers may assemble, and that every one may follow and may keep his proper place, so a banner is here held out to us, that we may assemble to it, namely, the gospel, which the Lord has lifted up among the Gentiles, by which Christ is preached to us.
And will gather together the dispersions of Judah. Hence we ought to conclude, that we cannot be gathered by the Lord unless we assemble to this ensign, and be joined to him by faith; for there is no other way in which he acknowledges us to be his sheep, than when, after having been scattered, we are gathered together, and meet in the same assembly under this ensign; as he says,
My sheep hear my voice and follow me. (John 10:27.)