Ambrosiaster : It contains a double meaning; for he will come to punish the wicked and to glorify the good. For he himself will appear glorious and marvelous to those who believe, following the example and faith of the apostles, when they are crowned, and the Gospel testifies to them on the day of the Lord. However, he will appear severe to the unbelievers, when they begin to be confined by eternal punishments. For the glory of the disciples is the crown, and its truth is the punishment of the unbelievers; because what was preached was not believed. — Commentary on 2 Thessalonians John Chrysostom : "Because our testimony unto you was believed in that day." That is, when those are brought into public view, who have suffered unnumbered ills, designed to make them apostatize from the faith, and yet have not yielded, but have believed, God is glorified. Then is shown the glory of these men also. "Judge none blessed," it says, "before his death." On this account he says, in that day will be shown those who believed. — Homily on 2 Thessalonians 3 Thietland of Einsiedeln : because our testimony has been believed by you They also call their testimony evangelical teaching, that which indeed was entrusted to them, because they received evangelical teaching from those preaching it.