Apply your heart to instruction1 and your ears to words of knowledge.
References for Proverbs 23:12
Do not withhold discipline from a child; if you punish him with the rod, he will not die.
Punish him with the rod and save his soul from death.
References for Proverbs 23:14
My son, if your heart is wise, then my heart will be glad;
my inmost being will rejoice when your lips speak what is right.2
References for Proverbs 23:16