For rulers - The apostle here speaks of rulers “in general.” It may not be “universally” true that they are not a terror to good works, for many of them have “persecuted” the good; but it is generally true that they who are virtuous have nothing to fear from the laws. It is “universally” true that the design of their appointment by God was, not to injure and oppress the good, but to detect and punish the evil. Magistrates, “as such,” are not a terror to good works.
Are not a terror ... - Are not appointed to “punish the good.” Their appointment is not to inspire terror in those who are virtuous and peaceable citizens; compare 1 Timothy 1:9.
But to the evil - Appointed to detect and punish evildoers; and therefore an object of terror to them. The design of the apostle here is evidently to reconcile Christians to submission to the government, from its “utility.” It is appointed to protect the good against the evil; to restrain oppression, injustice, and fraud; to bring offenders to justice, and thus promote the peace and harmony of the community. As it is designed to promote order and happiness, it should be submitted to; and so long as “this” object is pursued, and obtained, government should receive the countenance and support of Christians. But if it departs from this principle, and becomes the protector of the evil and the oppressor of the good, the case is reversed, and the obligation to its support must cease.
Wilt thou not ... - If you do evil by resisting the laws, and in any other manner, will you not fear the power of the government? Fear is “one” of the means by which men are restrained from crime in a community. On many minds it operates with much more power than any other motive. And it is one which a magistrate must make use of to restrain men from evil.
Do that which is good - Be a virtuous and peaceable citizen; abstain from crime, and yield obedience to all the just laws of the land,
And thou shalt have praise of the same - Compare 1 Peter 2:14-15. You shall be unmolested and uninjured, and shall receive the commendation of being peaceable and upright citizens. The prospect of that protection, and even of that reputation, is not an unworthy motive to yield obedience to the laws. Every Christian should desire the reputation of being a man seeking the welfare of his country, and the just execution of the laws.