8. But as in a good government ordinances without penalties lose their force the Lord also has not failed to place penalties to his ordinances; for Paul says: “Them that sin, rebuke before all, that others also may fear.” 1 Tim. 5:20. Christ also, in Matt. 18, has taught us to rebuke sinners. Paul teaches to purge out the old leaven, and to put away from among us those that are wicked; by which we understand the _Christian Ban_ which is instituted for the shaming and conversion of the sinner, and for the purpose of keeping the church pure, lest a little leaven leaven the whole lump (1 Cor. 5:6,13; Deut. 13:5; 2 Thess. 3:14; Gal. 5:9), according to Matt. 16:19: “I will give unto thee the keys of the kingdom of heaven,” and Matt. 18:18: “Whatsoever ye shall bind on earth shall be bound in heaven; and whatsoever ye shall loose on earth shall be loosed in heaven. This discipline is used against those who have once been enlightened, and have received for truth the sound doctrine of Christ, but who afterwards fall into false doctrine and heresy. These, after they have been admonished once or twice, but still persist in their evil principles, shall, by _Christian Separation_, be avoided and shunned, Tit. 3:10. Further, it is also used against persons who are going astray in the gross works of the flesh, upon sufficient confession of such persons themselves, or upon the testimony of other commendable witnesses; for such the church must have, before she may proceed with the separation. Gal. 5:21; Eph. 5:5; 1 Cor. 5:3; 6:9. 9. We understand, that _Marrying out of the Church_ is sinful, since it is contrary to the command of the Lord, and has at various times been reproved by the Lord and his prophets, through deeds as well as through words; and since it is a sin, arising either from a carnal, sensual life, or from a want of confidence in God, as though he would not provide him with a virtuous spouse; and is, moreover, committed with premeditation, for which reason it cannot be included in Gal. 6:1: “If a man be overtaken in a fault,... restore such a one in the spirit of meekness,” but much rather in Num. 15:30: “The soul that doeth aught presumptuously,... shall be cut off from among his people,” therefore many godfearing men, who were assembled at different times, have understood, as also we understand, that marriage out of the church, with impenitents and unbelievers, is also to be punished with separation from the church, that they may the more earnestly seek repentance. But as all sins are not equally great, and do not actually deserve separation without previous admonition, there is observed in the reproving of sin between brother and brother the rule in Matt. 18:15–18. And if any man is overtaken in a fault, then the rule Gal. 6:1 is followed.