What does 2 Thessalonians 2:2 mean?
Paul urges his readers not to let false teachings about the day of the Lord upset them or cause them to be afraid. They were to reject false teaching, whether it came by prophecy, a report, or a letter. Paul had already explained truths about these things to the Thessalonians (1 Thessalonians 1:10; 4:13–17; 5:1–11), but they were now experiencing doubts.Some who taught error about the day of the Lord claimed to have received the teaching directly from God. Some said they heard it from one source or another. In addition, the church must have received the teaching from a letter that bore a counterfeit of Paul's signature. Specifically, the false teaching alleged that the day of the Lord had arrived.
In his first letter the apostle John urges believers not to "believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone into the world" (1 John 4:1). John's advice parallels Paul's advice to the Thessalonians. Today, we must compare religious teachings with the teaching of Scripture, if we wish to enjoy peace of mind and spiritual balance.
Second Thessalonians 2:1–12 discusses the ''day of the Lord'' as an event from which Christians are exempt. Some Thessalonian believers were confused, thinking they had entered this time of hardship and judgment. Paul tells them to put such thinking aside, regardless of the source. He assures them the day of the Lord will not commence until a rebellion or apostasy occurs, followed by the emergence of the man of lawlessness. This figure will try to take on the role of God and deceive those who are lost and had rejected the truth. Empowered by Satan, the man of lawlessness will deceive unbelievers by performing signs and wonders. But at His coming, Jesus Christ will destroy the man of lawlessness.
The Christians of Thessalonica have not missed out on the events described in Paul's prior letter. Despite what some teachers apparently thought, they were not experiencing the ''day of the Lord,'' a time of God's great wrath and judgment. As proof, Paul offers instruction on events which had yet to occur, prior to the coming of the day of the Lord. The first is a rebellion, or a ''falling away.'' The second is the emergence of a ''man of lawlessness'' who will demonstrate satanic power. This will correspond with God removing His restraint, in some way, leaving sin freer rein to enable His judgment.