“The things which (Our Lord) commanded include His moral precepts as well as the doctrines of Faith; and they bind individuals and people, and nations, and kingdoms, and those who rule over them.
To talk about the separation between religion and politics is to talk at random by those who know no better; it is to talk impiety, or it is to talk apostasy, in those who have understanding; for what are politics but the morals of society; the morals of men collected and living together under public law?
The same law which governs the individual governs households, and the law that governs households governs the State. The legislature is as much bound to observe the moral law of the Gospel as the individual, as any private man; and therefore politics, so far from being separate, are a part of morals. They are morals applied to the public society of men, to the public action of nations, to the legislation of governments, to the executive authority of princes, for which reason to attempt to separate between religion and politics, is to shut up the priests, as it is said, in the sacristy; it is a revolt of the world endeavoring to shake off the yoke of Jesus Christ.
If He be the King of the world, which He has redeemed with His precious blood, He will judge the kings, and the princes, and the legislatures, and the nations of the world for the laws which they have made …” – Henry Cardinal Manning
[Henry Edward Manning was a Cardinal of the Catholic Church, Archbishop of Westminster and de facto spokesman of the Catholic Church in England and Wales 1865-1892.]