For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.
For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword - the official symbol of the authority to punish which is inherent in the magistrate's office,
In vain: for he is the minister of God, a revenger ('avenger') to [execute] wrath upon him that doeth evil.