And you are entitled to your opinion as much as everyone is entitled to theirs. That's the beauty of it. You can also argue that we know nothing for a fact, since every idea is relative and a single person can only know so much. Even that which we consider to be the most vital truth may be disproven at some point after we're long dead and forgotten about. Which means, of course, that one should necessarily consider everything they hear if it's of any importance to their matter, because nobody knows for certain. And yet somehow, I would believe it was him without question. He was, after all, a very wise man. Maybe the importance of those words shouldn't be lost on us, even if the author is not who we think it is.Anyway, Ian says that it's not actually a Marcus Aurelius quote.