15 Moreover if your brother sins against you, go and tell him his fault between you and him alone. If he hears you, you have gained your brother. 16 But if he will not hear, take with you one or two more, that ‘by the mouth of two or three witnesses every word may be established.’ 17 And if he refuses to hear them, tell it to the church. But if he refuses even to hear the church, let him be to you like a heathen and a tax collector. (Matthew 18:15–17, NKJV)
Matthew 18:15-17 does not address how to deal with the public sins of Christians. Galatians 2:11-14 and 1 Corinthians 5 give us examples of such public sins, and how to handle them, as we attempt to save the lost and protect the saved. We misapply Matthew 18:15-17 when we demand following its procedure when such public sins occur. This passage is the Lord’s prescription for saving souls when personal, private sin takes place. The Lord’s teaching is not about getting rid of some one, but about saving the soul of the one who has gone astray (Galatians 6:1-2). When we are approached about sinning against a brother or sister in Christ, may we humbly hear the evidence, and repent of every transgression. And, if we are sinned against, may we follow the Lord’s instructions given here, to save one who has gone astray.