2 Thessalonians 2:5

5. Remember, &c.--confuting those who represent Paul as having labored under error as to Christ's immediate coming when writing his first Epistle, and as now correcting that error. I told you--more than once, literally, "I was telling," or "used to tell."

Robert Jamieson, A. R. Fausset & David Brown, 1871 · public domain

Verse 5. Remember ye not, that, when I was yet with you, I told ye these things? The whole subject of the second advent of the Saviour seems to have constituted an important part of the instructions of Paul when at Thessalonica. He now refers them to what he had told them respecting the great apostasy, to show that his views had not changed, and that he did not mean to have them understand that the world would soon come to an end. He had stated these things to them, implying that a considerable interval must elapse before the Saviour would appear. Much of the obscurity of this prophecy arises from the fact, that the apostle alludes to things which he had told them when with them, of which we have now no knowledge. Hence, what would be perfectly clear to them on reading this letter, is now difficult to be understood.

Albert Barnes, 1834 · public domain

Verse 5 I told you these things - In several parts of this description of the man of sin, the apostle alludes to a conversation which had taken place between him and the members of this Church when he was at Thessalonica; and this one circumstance will account for much of the obscurity that is in these verses. Besides, the apostle appears to speak with great caution, and does not at all wish to publish what he had communicated to them; the hints which he drops were sufficient to call the whole to their remembrance.

Adam Clarke, 1831 · public domain

Something hindered or withheld the man of sin. It is supposed to be the power of the Roman empire, which the apostle did not mention more plainly at that time. Corruption of doctrine and worship came in by degrees, and the usurping of power was gradual; thus the mystery of iniquity prevailed. Superstition and idolatry were advanced by pretended devotion, and bigotry and persecution were promoted by pretended zeal for God and his glory. This mystery of iniquity was even then begun; while the apostles were yet living, persons pretended zeal for Christ, but really opposed him. The fall or ruin of the antichristian state is declared. The pure word of God, with the Spirit of God, will discover this mystery of iniquity, and in due time it shall be destroyed by the brightness of Christ's coming. Signs and wonders, visions and miracles, are pretended; but they are false signs to support false doctrines; and lying wonders, or only pretended miracles, to cheat the people; and the diabolical deceits with which the antichristian state has been supported, are notorious. The persons are described, who are his willing subjects. Their sin is this; They did not love the truth, and therefore did not believe it; and they were pleased with false notions. God leaves them to themselves, then sin will follow of course, and spiritual judgments here, and eternal punishments hereafter. These prophecies have, in a great measure, come to pass, and confirm the truth of the Scriptures. This passage exactly agrees with the system of popery, as it prevails in the Romish church, and under the Romish popes. But though the son of perdition has been revealed, though he has opposed and exalted himself above all that is called God, or that is worshipped; and has spoken and acted as if he were a god upon earth, and has proclaimed his insolent pride, and supported his delusions, by lying miracles and all kinds of frauds; still the Lord has not yet fully destroyed him with the brightness of his coming; that and other prophecies remain to be fulfilled before the end shall come.

Matthew Henry, 1706 · public domain