3 "So watch what you do. If your brother sins, tell him he is wrong. Then if he turns away from his sins, forgive him. 4 Suppose he sins against you seven times in one day. And suppose he comes back to you each time and says, 'I'm sorry.' Forgive him."
To rebuke does not mean to point out every sin we see; it means to bring sin to a person's attention with the purpose of restoring him or her to God and to fellow humans. When you feel you must rebuke another Christian for a sin, check your attitudes before you speak. Do you love the person? Are you willing to forgive? Unless rebuke is tied to forgiveness, it will not help the sinning person.