Well first let me quote from the correct Bible:
2 Thessalonians 2:1-4
Authorized (King James) Version (AKJV)
2 Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him, [SUP]2 [/SUP]that ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand. [SUP]3 [/SUP]Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; [SUP]4 [/SUP]who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.
The coming of our Lord Jesus Christ in this passage, I believe is a reference to His Second Coming.
The phrase: "our gathering together unto him" I believe it refers to the Rapture of the Body of Christ. Which takes place before the Second Advent.
The phrase: "that day" in the context of the passage of 1 Thess. 2:1-4 is a reference to the Day of Christ.
The Day of Christ is not the Rapture. The Day of Christ is the time of Jacob's trouble and the consummation of it at Christ's Second Coming.
In Paul's day, there were false prophets and deceivers who were posing as the apostles and were writing letters to the believers at Thessolinca; and they were committing fraud by forgering signatures. In other words, they were signing their misleading letters with the names of the apostles.
So a lot of Christians in Thessolinca were starting to believe that they somehow missed the Rapture and they were already living in the Day of the Lord (7 year tribulation period).
That is why Paul wrote the following words in verse 2:
"that ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand."
2 Thessalonians 2:3
Authorized (King James) Version (AKJV)
[SUP]3 [/SUP]Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
The man of sin, the son of perdition; which is mentioned in verse 3 of 2 Thessalonians 2, is definitely the antichrist. No doubt.