Chapter 11 — Part I — Article IX (Of the Church)
Section 269. Q. How is the Church holy, when she has in her sinners? A. Men, who sin, but purify themselves by true repentance, hinder not the Church from being holy; but impenitent sinners, either by the visible act of Church authority, or by the invisible judgment of God, are cut off from the body of the Church; and so she is, in respect of these, also kept holy. Put away from among yourselves that wicked person. 1 Cor. v. 13. Nevertheless the foundation of God standeth sure, having this seal: The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity. 2 Tim. ii. 19.