Talmud: “Never tell a fool that he is a fool. All you’ll have is an angry fool”
I never saw that particular passage of the Talmud, but there are 3,000 huge folio pages in the Babylonian Talmud, and I don’t know how many in the Jerusalem, and I’ve only learned a fraction of the dense Aramaic texts, so I’ll take your word for it, because it makes sense.