So then, brothers, be strong in purpose, and keep the teaching which has been given to you by word or by letter from us.

comfort and encourage and strengthen your hearts [keeping them steadfast and on course] in every good work and word.

But the Lord is faithful, who shall stablish you, and keep you from evil.

We have faith in you through the Lord that you are doing and will keep doing what we direct you to do.

Now we command you, believers, in the name of our Lord Jesus Christ and by His authority, that you withdraw and keep away from every brother or sister who leads an undisciplined life and does not live in accordance with the tradition and teaching that you have received from us.

Now in the Lord Jesus Christ we charge and exhort such persons to keep quiet, to do their work and earn their own living.

But if any one obey not our word by the letter, mark that man, and do not keep company with him, that he may be ashamed of himself;