"Make Asaph listen to my teaching. As it says in the scripture (Deuteronomy 4:9-10), "Only take care, and keep your soul diligently, lest you forget the things that your eyes have seen, and lest they depart from your heart all the days of your life. Make them known to your children and your children's children— how on the day that you stood before the Lord your God at Horeb, the Lord said to me, 'Gather the people to me, that I may let them hear my words, so that they may learn to fear me all the days that they live on the earth, and that they may teach their children so.'”
God made a covenant with Israel not for their sake, but for the sake of the Torah so that it would not be forgotten from their mouths. As it says, "And He established a testimony in Jacob and appointed a law in Israel" (Psalm 78:5). The Torah that God gave to Israel is the elixir of life, and it says, "For it is not an empty thing for you, because it is your life" (Deuteronomy 32:47). One should not say that only the Psalms are Torah, but also the riddles and parables that are allegories of the Torah.
As it says, "I will open my mouth in a parable; I will utter dark sayings from of old" (Psalm 78:2). And as God says to Ezekiel, "Son of man, put forth a riddle and speak a parable to the house of Israel" (Ezekiel 17:2). And as Solomon says, "To understand a proverb and a saying, the words of the wise and their riddles" (Proverbs 1:6). Therefore, Asaph says, "Make Asaph listen to my teaching.
The Psalms are Torah." They said to Asaph, "You do not know." He replied, "I will recount what we have heard and understood: And He established a testimony in Jacob and appointed a law in Israel." The Torah that God gave to Israel is a healing remedy, as it says, "It will be health to your flesh" (Proverbs 3:8)."...