17Now I beseech you, brethren, to mark them who make dissensions and offences contrary to the doctrine which you have learned, and avoid them.
18For they that are such, serve not Christ our Lord, but their own belly; and by pleasing speeches and good words, seduce the hearts of the innocent.
19For your obedience is published in every place. I rejoice therefore in you. But I would have you to be wise in good, and simple in evil.
20And the God of peace crush Satan under your feet speedily. The grace of our Lord Jesus Christ be with you.