So that I might respond to the proposed difficulties in order:
a. With respect to the first, I observe that Isaiah in that sublimer, but especially well-known, prophetic style thus depicts that blessed state of the Church, to be gathered under the New Testament, in this chapter 60, so that from the very beginnings of that Economy the fulfillment of this Prophecy in great part was looked for; a fuller exhibition of which we expect day-by-day, but the perfect fulfillment of which, in all details, is rightly said to be reserved for heaven. Compare SCHMIDT and HELLENBROEK on Isaiah, and RIDDER’S Schriftuurlyk Licht. And so with the words of Isaiah Paul was able best, and according to the sense intended by the Holy Spirit, to stir up and to console the Gentiles to whom he was writing, called out through the Gospel to communion with God and Christ. The Most Illustrious VITRINGA himself, in his Commentario on Isaiah 60:1, tome 2, page 802, asserts: “There are those, says Jerome, that await in the future all these things that we relate as both to be ACCOMPLISHED IN PART, and to be completely fulfilled, after the first advent of the Savior unto the consummation of the World; they await them in the future, when, with the fullness of the Gentiles coming in, all Israel is to be saved: whose opinion is by no means to be despised, since we know that these things are to be fulfilled only spiritually, and not carnally. He wrote this with complete accuracy, and this is the sense of the most ancient Doctors of the Church. Jerome himself certainly professes that in his own time these things were only fulfilled IN PART, which I would gladly concede: he was awaiting perfect fulfillment in the future.” But if the Most Illustrious VITRINGA would gladly concede the argument the Isaiah 60 was fulfilled in part already in the time of Jerome; the prophecies occurring here ought also to have regard, according to the intention of the Spirit, in part to the time preceding the age of Jerome, and so to predict the gathering of the Church of Jews and Gentiles soon after the advent of Messiah.
 Romans 11:25, 26.