when he comes to be glorified in his saints, and to be admired among all those who have believed (because our testimony to you was believed) in that day.
(Because our testimony among you was believed) in that day; the phrase, "in that day", belongs to all that goes before, as that Christ shall take vengeance on wicked men, and they shall be punished by him, and he shall be glorified and admired in and by his people in that day, when he shall be revealed from heaven, and come to judge both quick and dead. Though some versions read it in construction with the clause immediately preceding, "because our testimony among you was believed in that day"; or concerning that day; that is, you gave credit to the testimony we bore, when among you, concerning this illustrious day of the Lord; or our testimony, the ministry of the word by us, in which we bore a testimony to the person and grace of Christ, to his first, and to his second coming, was received and embraced by you with a view to this day, and to the enjoyment of the glory of it. The Arabic version renders it, "for our testimony will be true in that day"; that is, it will appear to be so, everything we have said will be accomplished then. The Syriac version is very remote, "that our testimony concerning you may be believed in that day": but it is best to read this clause in a parenthesis, as in our version; which is an application of what is said to the Thessalonians, who might conclude, that since they had embraced the testimony of the Lord Jesus, borne unto him by his apostles, they would be found among the number of the saints and believers, in whom Christ would be glorified and admired; the consideration of which might animate and encourage them to endure afflictions and persecutions with patience, and to hold out to the end, and at last enjoy the heavenly glory, for which the apostle next prays.