Summi Pontificatus §82

⁸² Once the bitterness and the cruel strifes of the present have ceased, the new order of the world, of national and international life, must rest no longer on the quicksands of changeable and ephemeral standards that depend only on the selfish interests of groups and individuals. No, they must rest on the unshakable foundation, on the solid rock of natural law and of Divine Revelation. There the human legislator must attain to that balance, that keen sense of moral responsibility, without which it is easy to mistake the boundary between the legitimate use and the abuse of power. Thus only will his decisions have internal consistency, noble dignity and religious sanction, and be immune from selfishness and passion.