Musar su Salmi 40:9

When Rav spoke about the righteous "sitting," he referred to their mode of life in this world Even in this world their physical enjoyments, i.e. נהנין, came from the brilliance of G–d's Presence; they made use of the comforts of this world only in order to better appreciate the brilliance of G–d's Presence. Rabbi Yehudah Hanassi's testimony meant that he had used all the comforts of this world only in order to further his Torah study and his spiritual advancement. When the Torah (Exodus 24,11) speaks about the אצילי בני ישראל, the spiritually most highly placed Israelites eating and drinking and enjoying a vision of G–d, this is an allusion to the motivation which should be present when we eat and drink while in this world. A similar allusion is found in Psalms 40,9: ותורתך בתוך מעי, "Your Torah is within my entrails." The correct way to live in this world is spelled out in Proverbs 21,23: שומר פיו ולשונו שומר מצרות נפשו, "He who guards his mouth and tongue, keeps his soul from troubles." Onkelos already explained (Genesis 2,7) that what makes a person into a human being is the power of speech. It follows that we have to sanctify ourselves through the manner in which we use this power of speech.