When the scorner is punished, the simple is made wise: and when the wise is instructed, he receiveth knowledge.
– Proverbs 21:11
Teachability is a mark of maturing and growing in wisdom (Proverbs 1:5; 9:9). The proverb contrasts the wise and the simple. The wise receives instruction and the simple has to see the scorner punished to wise up. Proverbs teaches us wisdom is imparted by instruction, correction, warning, and punishment. The wiser we are, the less time we will spend toward the punishment end of that scale.