Musar for Proverbs 22:20

And since everything depends upon memory, I must list thirty ^** The idea of organizing one’s wisdom into thirty precepts is based upon the kere of Proverbs 22:20. things that you ought to remember twice a day. And you should place them in the depths of your heart, and in your thoughts. Do not remember them with your mouth alone, but write them on the tablet of your heart. Then your service will be well received by God, Blessed be He, and you will obtain favor and kindnesses before Him.