If another believer sins against you, go privately and point out the offense. If the other person listens and confesses it, you have won that person back.
Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
If another member of the church sins against you, go and point out the fault when the two of you are alone. If the member listens to you, you have regained that one.
So be strong and courageous! Do not be afraid and do not panic before them. For the Lord your God will personally go ahead of you. He will neither fail you nor abandon you.