Didymus the Blind : Thorns that burn under a pot make loud crackling noises. This is like the laughing of the foolish. It makes noise and is crackling, but not because it educates the soul.… As the thorns produce noise when they as plants are burned under a pot, in the same way the laughter of the foolish comes out of a bad soul that is burning.… Thorns are earthly worries, shameful desires and uncurbed joys. — COMMENTARY ON Ecclesiastes 203:3 Jerome : "It is better to hear the rebuke of the wise, than for a man to hear the song of fools. For as the crackling of thorns under the pot, so is the laughter of the fool: this too is vanity. "For it is better to be rebuked by a wise man, than to be deceived by flattering praise. Similar to this is the passage which says, "better are the wounds of a friend, than the free kisses of an enemy" [Prov. 27, 6.]. Just as the sound of sharp thorns under the pot gives out a harsh sound, so the words of a flattering teacher are not of any use, or the worries of the world, which are interpreted as 'thorns', or the sound of one who encourages his listeners, or of one who prepares them for the fire which is to come. Let us look at what Symmachus has to say about the passage that we have as "since just as the sound…fool." Understanding the meaning which we have already explained above, he says, 'for a man is bound in chains by the voice of the ignorant". This means that one listener is tied up to the word of such teachers, while the chains of his sins restrain another. — Commentary on Ecclesiastes