Charles Ellicott Commentary 2 Thessalonians 1:12

"that the name of our Lord Jesus may be glorified in you, and ye in him, according to the grace of our God and the Lord Jesus Christ." — 2 Thessalonians 1:12 (ASV)

That the name... — This verse gathers up what has been said in 2 Thessalonians 1:8–10. Seeing the favors bestowed upon Christians on the last day, everyone—both the lost and the saved—will be forced to acknowledge the glory (that is, the divine perfection) of the Jesus whose identity as the Christ had been rejected, as well as the glory (that is, the true dignity) of the Christians who had been despised for their allegiance to Him.

It stands to reason that Christians must share Christ’s “glory” (that is, full recognition; compare the note on 1 Thessalonians 2:6) on that day. For when the lost finally recognize who He is, it is by that very fact a recognition that believers were right and wise to follow Him. The words according to the grace apply only to the phrase and you in Him. It is the gracious will of God (for “grace” here hardly has its strict theological sense), in which Christ concurs, that we should be “glorified in Him” in this way.