If any man doesn't obey our word in this letter, note that man, that you have no company with him, to the end that he may be ashamed.
Have no company with him -- "It is all social intercourse, visitation, and companioning with offenders that must be ceased. Christians are not to mix with persons living in open rebellion against the teachings of the Lord. The purpose of such ostracism is to produce shame and repentance on the part of the offender..." Coffman.