not to let your mind be quickly shaken or be troubled, neither in spirit nor by word, nor by letter coming as though from us, as if the day of Christ is already here.
Now we command you, brothers, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother who walks in idleness and not according to the tradition that he received from us.
holding firmly the trustworthy word that is in accordance with the teaching, that he may be able both to exhort with sound teaching and to convince those who oppose it.
Beloved, while I diligently tried to write to you of the salvation we have in common, I found it necessary to write and appeal to you to contend for the faith which was once delivered to the saints.