John Calvin Reformed @genevareformer

1 Now I beseech you, by the coming. It may indeed be read, as I have noted on the margin, concerning the coming, but it suits better to view it as an earnest entreaty, taken from the subject in hand, just as in 1 Corinthians 15:31, when discoursing as to the hope of a resurrection, he makes use of an oath by that glory which...

Matthew Henry Presbyterian @wholebiblehenry

From these words it appears that some among the Thessalonians had mistaken the apostle's meaning, in what he had written in his former epistle about the coming of Christ, by thinking that it was near at hand, - that Christ was just ready to appear and come to judgment.

Commenting on 2 Thessalonians 2:1-2

John Gill Reformed Baptist @doctorgill

Now we beseech you, brethren,.... The apostle having finished his first design in this epistle, which was to encourage the saints to patience under sufferings, proceeds to another view he had in writing it, and that is, to set the doctrine of Christ's coming, as to the time of it, in its proper light; and this is occasioned by what he had said concerning it...