Before he says ought to the brethren, he needs to talk to God. Later he may need to talk to the church, but not before he confesses to God. There is another fellow on the front pew who has no business there. He sinned against the church across town when he sowed discord there. Send him to confess where he sinned.
Confession of sin anticipates a plea for forgiveness.
That is not the Bible brand of confession. A man who seeks no pardon is not confessing sin.