Jean-Henri Merle d’Aubigné (16 August 1794 – 21 October 1872) was a Swiss Protestant minister and historian of the Reformation. In the 1830s onwards he wrote his majestic “History of the Reformation in the 16th century.” (free ebook). He wrote:
“Whenever religion has been under discussion, there have been three points to which our attention has been directed. God, Man, and the Priest. There can only be three kinds of religion upon earth, according as God, Man, or the Priest, is its author and its head. I denominate that the religion of the priest, which is invented by the priest, for the glory of the priest, and in which a sacerdotal caste is dominant. By the religion of man, I mean those various systems and opinions which human reason has framed, and which, being the offspring of human infirmity, are consequently devoid of all healing power. The term divine religion I apply to the truth such as God gave it, — the end and aim of which are the glory of God and the salvation of man.”
Thus we have the Roman Catholicism (priest), the Reformation (God) and Humanism (man).