How to recognize a fool:
A fool hates wisdom
A fool hates doing what is right
A fool loves foolishness
A fool makes his mother sad
A fool chatters on without listening
A fool brings trouble to his family
A fool drags his friends into foolishness
A fool is not careful with his money
A fool explodes with anger
“A fool finds pleasure in evil conduct, but a man of understanding delights in wisdom.” Proverbs 10: 23