If you have sinned against someone, you do not need to wait for them to hunt you down. If a brother comes to talk to you, tells you your fault, and if you have sinned, then you ought to acknowledge it, seek his forgiveness, and be restored to fellowship. But confession of sin is not only a reaction when caught or confronted.
Jesus preached in Matthew 5 that a man shouldn’t even give money if he remembers that he’s sinned against someone else.
So if you are offering your gift at the altar and there remember that your brother has something against you, leave your gift there before the altar and go. First be reconciled to your brother, and then come and offer your gift. (Matthew 5:23–24)
I read an article about winnowing the givers recently, and it’s certainly not the typical approach of many ministries, or of persons who think that they can deal with guilt by giving money. Neither cash or check can cover a sinful heart. God doesn’t want even an offering unless we’ve done what we can to make it right.
Our God is a God who deals with sin and enables reconciliation. He desires worship from those who deal with sin and pursue reconciliation.
What sorts of offenses might our brother have against us? The preceding verse talks about being angry, about insulting, and ridiculing (verse 22). The list isn’t exhaustive, but it does represent hateful heart attitudes that separate us. Sin separates, and we are to pursue reconciliation with other persons before we worship, including our offering.