If Paul wrote about it in 1 and 2 Thessalonians, then read and reread what 2 Thess 2:3 says and think about it. Ask yourself, does it say we will see antichrist? Is "the Day of the LORD" in 1 Thess 5:2 relating to "that day" in 2 Thess 2:3? Do not be deceived. Many already have been by mere humans, and you are no match for Satan on your own so don't get overconfident. He is coming to test and devour you and i. Be ready. A lot more on this for sure.
1 Thessalonians
4:13 But I would not have you to be ignorant, brothers, concerning them which are asleep, that you sorrow not, even as others which have no hope.
4:14 For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.
4:15 For this we say to you by the word of the Lord, that we which are alive and remain to the coming of the Lord shall not prevent them which are asleep.
4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
4:17 Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
4:18 Why comfort one another with these words.
5:1 But of the times and the seasons, brothers, you have no need that I write to you.
5:2 For yourselves know perfectly that the day of the Lord so comes as a thief in the night.
2 Thess
2:1 Now we beseech you, brothers, by the coming of our Lord Jesus Christ, and by our gathering together to him,
2:2 That you 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.
2:3 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;
2:4 Who opposes and exalts himself above all that is called God, or that is worshipped; so that he as God sits in the temple of God, showing himself that he is God
