I urge you, brothers and sisters, to keep an eye on those who create dissensions and hindrances, in opposition to the teaching that you have learned; avoid them.
If that person refuses to listen to them, tell it to the church, and if the offender refuses to listen even to the church, let such a one be to you as a gentile and a tax collector.
Since we have heard that certain persons who have gone out from us, though with no instructions from us, have said things to disturb you and have unsettled your minds,
for you are still fleshly. For as long as there is jealousy and quarreling among you, are you not fleshly and behaving according to human inclinations?
But because of false brothers and sisters secretly brought in, who slipped in to spy on the freedom we have in Christ Jesus, so that they might enslave us—
Watch out that no one takes you captive through philosophy and empty deceit, according to human tradition, according to the elemental principles of the world, and not according to Christ.
Now we command you, brothers and sisters, in the name of our Lord Jesus Christ, to keep away from every brother or sister living irresponsibly and not according to the tradition that they received from us.
They went out from us, but they did not belong to us, for if they had belonged to us they would have remained with us. But by going out they made it plain that none of them belongs to us.