John Chrysostom
What does “not only because of wrath” mean? You must obey, says the Apostle, not only because by not submitting you resist God, and bring great calamities upon yourself from God and men. You must also obey because the ruler, as guardian of peace and civil good order, is your greatest benefactor. For countless benefits come to states from authorities. If they are abolished, everything will perish. Neither cities, nor villages, nor houses, nor marketplace, nor anything else will stand. Everything will be overturned, because the stronger will devour the weaker. Thus, even if wrath did not follow disobedience, you would still have to submit, so that you would not prove conscienceless and ungrateful toward a benefactor.