² 
A [closed-minded] fool does not delight in understanding,
But only in revealing his personal opinions [unwittingly displaying his self-indulgence and his stupidity].

⁶ 
A fool’s lips bring contention and strife,
And his mouth invites a beating.
⁷ 
A fool’s mouth is his ruin,
And his lips are the snare of his soul.

¹³ 
He who answers before he hears [the facts]—
It is folly and shame to him.^(A)