The sentiment on which [papal] infallibility was founded could not be reached by argument, the weapon of human reason, but resided in conclusions tra… - John Dalberg-Acton, 1st Baron Acton

The French philosopher Charron was one of the men least demoralised by party spirit, and least blinded by zeal for a cause. In a passage almost literally taken from St. Thomas, he describes our subordination under the law of nature, to which all legislation must conform; and he ascertains it not by the light of revealed religion, but by the voice of universal reason, through which God enlightens the consciences of men. Upon this foundation Grotius drew the lines of real political science. In gathering the materials of International law, he had to go beyond national treaties and denominational interests, for a principle embracing all mankind. The principles of law must stand, he said, even if we suppose that there is no God. By these inaccurate terms he meant that they must be found independently of Revelation. From that time it became possible to make politics a matter of principle and of conscience, so that men and nations differing in all other things could live in peace together, under the sanctions of a common law.

The Stoics could only advise the wise man to hold aloof from politics, keeping the unwritten law in his heart. But when Christ said: "Render unto Cæsar the things that are Cæsar's, and unto God the things that are God's," those words, spoken on His last visit to the Temple, three days before His death, gave to the civil power, under the protection of conscience, a sacredness it had never enjoyed, and bounds it had never acknowledged; and they were the repudiation of absolutism and the inauguration of freedom.

The strongest of all the obstacles to progress, the reign of the dead.