Whether Christians are bound to obey the secular powers?

Objections

Objection 1 : It seems that Christians are not bound to obey the secular power. For a gloss on Mt. 17:25, "Then the children are free," says: "If in every kingdom the children of the king who holds sway over that kingdom are free, then the children of that King, under Whose sway are all kingdoms, should be free in every kingdom." Now Christians, by their faith in Christ, are made children of God, according to Jn. 1:12: "He gave them power to be made the sons of God, to them that believe in His name." Therefore they are not bound to obey the secular power.
Objection 2 : Further, it is written (Rm. 7:4): "You . . . are become dead to the law by the body of Christ," and the law mentioned here is the divine law of the Old Testament. Now human law whereby men are subject to the secular power is of less account than the divine law of the Old Testament. Much more, therefore, since they have become members of Christ's body, are men freed from the law of subjection, whereby they were under the power of secular princes.
Objection 3 : Further, men are not bound to obey robbers, who oppress them with violence. Now, Augustine says (De Civ. Dei iv): "Without justice, what else is a kingdom but a huge robbery?" Since therefore the authority of secular princes is frequently exercised with injustice, or owes its origin to some unjust usurpation, it seems that Christians ought not to obey secular princes.