The Apostle Paul
2 Thessalonians 2:6BSB·traditional attribution

And you know what is now restraining him, so that he may be revealed at the proper time.

John Calvin Reformed @genevareformer

6. And now what withholdeth Τὸ κατέχον means here properly an impediment or occasion of delay. Chrysostom, who thinks that this can only be understood as referring to the Spirit, or to the Roman Empire, prefers to lean to the latter opinion.

Matthew Henry Presbyterian @wholebiblehenry

In these words the apostle confutes the error against which he had cautioned them, and gives the reasons why they should not expect the coming of Christ as just at hand. There were several events previous to the second coming of Christ; in particular, he tells them there would be, I. A general apostasy, there would come a falling away first, Th2 2:3.

Commenting on 2 Thessalonians 2:3-12

John Gill Reformed Baptist @doctorgill

And now ye know what withholdeth,.... Or hinders the revelation of the man of sin, or antichrist; by which is meant not the Apostle Paul, though he by his ministry was a very great hinderance of the growth of error, and the spread of evil practices in the churches, and so of the more open appearance of the man of sin in his forerunners; and...