Believe whatever the author of Second Thessalonians tells you to believe.
Stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
2 Thessalonians 2:15 2:15 (1150)
Follow the author of Second Thessalonians. 3:7 (1151)
Stay away from people who walk disorderly. 3:6 (1195)
Stay away from people who do not accept the tradition taught by the author of Second Thessalonians.
We command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh ...
not after 3:6 (1196)
Shun those who disobey the commandments in Second Thessalonians. 3:14 (1197)
Don't be deceived by people who say the end of the world will come before there's a falling away and the man of sin is revealed. 2:3 (1202)