Complex sentence: Though he made a case for papal authority and centralization of the church in the religious sphere, he was a liberal in his political beliefs who advocated the separation of church and state as well as the freedoms of conscience, education, and the press.
Split into simpler sentences: Though he made a case for papal authority and centralization of the church in the religious sphere, he was a liberal in his political beliefs. He advocated the separation of church and state and the freedoms of conscience, education, and the press.