Diuturnum §24

²⁴ This, indeed, is all the graver because rulers, in the midst of such threatening dangers, have no remedies sufficient to restore discipline and tranquility. They supply themselves with the power of laws, and think to coerce, by the severity of their punishment, those who disturb their governments. They are right to a certain extent, but yet should seriously consider that no power of punishment can be so great that it alone can preserve the State. For fear, as St. Thomas admirably teaches, "is a weak foundation; for those who are subdued by fear would, should an occasion arise in which they might hope for immunity, rise more eagerly against their rulers, in proportion to the previous extent of their restraint through fear." And besides, "from too great fear many fall into despair; and despair drives men to attempt boldly to gain what they desire."(30) That these things are so we see from experience. It is therefore necessary to seek a higher and more reliable reason for obedience, and to say explicitly that legal severity cannot be efficacious unless men are led on by duty, and moved by the salutary fear of God. But this is what religion can best ask of them, religion which by its power enters into the souls and bends the very wills of men causing them not only to render obedience to their rulers, but also to show their affection and good will, which is in every society of men the best guardian of safety.