Proverbs has a lot to say about wisdom, and it also has a lot to say about foolishness. See if anything on this list surprises you:
A fool starts fights. (Proverbs 18:6)
A fool is easily upset. (Proverbs 12:16)
A fool believes everything he reads. (Proverbs 14:15)
A fool loves to talk, but hates to listen. (Proverbs 18:2)
A fool is fiercely independent. (Proverbs 28:26)
A fool makes light of sin. (Proverbs 10:23)
A fool hates their mama. (Proverbs 15:20)
I can always tell a fool, unless they’re hiding inside me. But Scripture—especially Proverbs—has a way of forcing me to confront uncomfortable truths. That’s why James said Scripture is like a mirror (James 1:22–25).