Charlie Munger at the Daily Journal Annual Meeting 2019 (transcript):

It’s amazing how well Berkshire Hathaway and the Daily Journal, for that matter, have succeeded with nothing more than basic morality and sturdy common sense. But of course, when people talk about common sense, they mean uncommon sense. Every time you hear that somebody has a lot of common sense, it means he’s got uncommon sense. And it is much harder to have common sense then it is generally thought.