2 Thessalonians 2:2
2:2The ‘great day of the Lord's return’ includes many events. It will be a time when God will win against all his enemies. See Zephaniah 1:14-18. He will punish them. See Isaiah 13:9. This will cause trouble on the earth. See Isaiah 13:11; Amos 5:18-20. But it will be a very good time for those who love God. It is a time when God will make his people free. See Jeremiah 30:7-9; Joel 3:16. It is the time when Jesus will return and he will start to rule on the earth.
2:2When he was with them, Paul had taught the Christians at Thessalonica about Jesus' return. See verse 5. He had said more about it in his first letter to them. See 1 Thessalonians 4:13-17; 5:1-10. But other people were now teaching that it had already happened. So Paul is explaining that certain things must happen before Jesus returns.