That wasn’t law; it wasn’t gospel: it was only an opinion — my opinion, and I was only a man, one man: so it wasn’t worth any more than the pope’s — or any less, for that matter.

Mark Twain (1835–1910) American writer [pseud. of Samuel Clemens]

Novel (1889), A Connecticut Yankee in King Arthur’s Court, Part 3 “The Tale of the Lost Land,” ch. 18 “In the Queen’s Dungeons”
    (Source)