18 In political affairs, and all matters civil, the laws aim at securing the common good, and are not framed according to the delusive caprices and opinions of the mass of the people, but by truth and by justice; the ruling powers are invested with a sacredness more than human, and are withheld from deviating from the path of duty, and from overstepping the bounds of rightful authority; and the obedience is not the servitude of man to man, but submission to the will of God, exercising His sovereignty through the medium of men. Now, this being recognized as undeniable, it is felt that the high office of rulers should be held in respect; that public authority should be constantly and faithfully obeyed; that no act of sedition should be committed; and that the civic order of the commonwealth should be maintained as sacred.
Source: Immortale Dei (Vatican.va)