Most Relevant Verses
Live in harmony with one another; do not be haughty (snobbish, high-minded, exclusive), but readily adjust yourself to [people, things] and give yourselves to humble tasks. Never overestimate yourself or be wise in your own conceits.
He who walks [as a companion] with wise men is wise, but he who associates with [self-confident] fools is [a fool himself and] shall smart for it.
But now I write to you not to associate with anyone who bears the name of [Christian] brother if he is known to be guilty of immorality or greed, or is an idolater [whose soul is devoted to any object that usurps the place of God], or is a person with a foul tongue [railing, abusing, reviling, slandering], or is a drunkard or a swindler or a robber. [No] you must not so much as eat with such a person.
But if anyone [in the church] refuses to obey what we say in this letter, take note of that person and do not associate with him, so that he may be ashamed.