26 The tracing out of these rights and duties being thus set forth, it is plainly evident that the governing powers are wholly free to carry out the business of the State; and this not only not against the wish of the Church, but manifestly with her co-operation, inasmuch as she strongly urges to the practice of piety, which implies right feeling towards God, and by that very fact inspires a right-mindedness toward the rulers in the State. The spiritual power, however, has a far loftier purpose, the Church directing her aim to govern the minds of men in the defending of the "kingdom of God, and His justice,"(28) a task she is wholly bent upon accomplishing.
Source: Sapientiae Christianae (Vatican.va)