For the Lord's sake. Because it is the Lord's will. Whether the king. The Roman emperor whom the Greeks styled king. The magistrates placed over the provinces of the Roman empire.
Rulers are necessary, both to punish the evil and to reward the good.
That with well doing. It is God's will that thus you may silence the charge that you are seditious persons. Christians, freed from the bondage of sin and of the law, and having the free spirit of children, must not use their liberty as a cloke, an excuse, for wickedness. They are God's servants. Honor all men.