God saves sinners in the Lord Jesus Christ. God made Him to be sin, that He might make sinners righteous. The final judgment and punishment for sin is eternal death. The Lord Jesus Christ, in His suffering and death underwent the equivalent of the sinners eternal punishment to the satisfaction of the Just and Holy God. The blood and righteousness of the Lord Jesus Christ guarantees the eternal salvation of all those for whom God intended it.
Men make a joke of sin and being a sinner.
David's thoughts about himself were scriptural.