Ooh such a thought-provoking quote. I highly agree with it, except Id say what an author doesnt know could fill a library! Theres just too much lore, history, character backstory, politics, etc. that never come into a story which the author doesn't have time to explore
Yes, yes, buddy: as said, it seems, by Langland (or Gower🤔): 'What the author knoweth may well forge a single tome, but that which he knoweth not—a million of tomes.'