Pacem in Terris §47

⁴⁷ But it must not be imagined that authority knows no bounds. Since its starting point is the permission to govern in accordance with right reason, there is no escaping the conclusion that it derives its binding force from the moral order, which in turn has God as its origin and end. Hence, to quote Pope Pius XII, "The absolute order of living beings, and the very purpose of man—an autonomous being, the subject of duties and inviolable rights, and the origin and purpose of human society—have a direct bearing upon the State as a necessary community endowed with authority. Divest it of this authority, and it is nothing, it is lifeless.... But right reason, and above all Christian faith, make it clear that such an order can have no other origin but in God, a personal God, our Creator. Hence it is from Him that State officials derive their dignity, for they share to some extent in the authority of God Himself."(31)