1 Peter 2:13

The general rule of a Christian conversation is this, it must be honest, which it cannot be if there be not a conscientious discharge of all relative duties. The apostle here particularly treats of these distinctly. I. The case of subjects. Christians were not only reputed innovators in religion, but disturbers of the state; it was highly necessary, therefore, that the apostle should settle the rules and measures of obedience to the civil magistrate, which he does here, where, 1. The duty required is submission, which comprises loyalty and reverence to their persons, obedience to their just laws and commands, and subjection to legal penalties. 2. The persons or objects to whom this submission is due are described, (1.) More generally: Every ordinance of man. Magistracy is certainly of divine right; but the particular form of government, the power of the magistrate, and the persons who are to execute this power, are of human institution, and are governed by the laws and constitutions of each particular country; and this is a general rule, binding in all nations, let the established form of be what it will. (2.) Particularly: To the king, as supreme, first in dignity and most eminent in degree; the king is a legal person, not a tyrant: or unto governors, deputies, proconsuls, rulers of provinces, who are sent by him, that is, commissioned by him to govern. 3. The reasons to enforce this duty are, (1.

— Matthew Henry's Concise Commentary (public domain)

every ordinance of man--"every human institution" [ALFORD], literally, "every human creation." For though of divine appointment, yet in the mode of nomination and in the exercise of their authority, earthly governors are but human institutions, being of men, and in relation to men. The apostle speaks as one raised above all human things. But lest they should think themselves so ennobled by faith as to be raised above subordination to human authorities, he tells them to submit themselves for the sake of Christ, who desires you to be subject, and who once was subject to earthly rulers Himself, though having all things subject to Him, and whose honor is at stake in you as His earthly representatives. Compare Rom 13:5, "Be subject for conscience' sake." king--The Roman emperor was "supreme" in the Roman provinces to which this Epistle was addressed. The Jewish zealots refused obedience. The distinction between "the king as supreme" and "governors sent by him" implies that "if the king command one thing, and the subordinate magistrate another, we ought rather to obey the superior" [AUGUSTINE in GROTIUS]. Scripture prescribes nothing upon the form of government, but simply subjects Christians to that everywhere subsisting, without entering into the question of the right of the rulers (thus the Roman emperors had by force seized supreme authority, and Rome had, by unjustifiable means, made herself mistress of Asia), because the de facto governors have not been made by chance, but by the providence of God.

— Jamieson-Fausset-Brown Commentary (public domain)