이사야 40:6의 Musar

And the prophet further said: "She has none to guide her out of all the sons she bore, none takes her hand of all the sons she raised" (Yeshaya 51:18). And "all flesh is grass, and all his kindness is as the blossom of the field" (Isaiah 40:6), which our sages of blessed memory, explained: "all the kindness they do is only for themselves" (Zohar Chadash 117a, Tikunei Zohar 30,63a), i.e. for their own good and benefit; they do not intend for this perfect intention and do not seek the raising of G-d's honor and the redemption of Israel.

Let us begin with love of Torah. This means studying only for the sake of the Holy One Blessed is He and His Shechinah and not for personal gain such as to be considered a scholar or even to earn reward in the World to Come. Concerning the person who studies for his own benefit and honor it was stated (Yeshayahu 40:6), “And all of his lovingkindness is like the grass of the field” (Tikkunim 30, 73b; Tikkunei Zohar Chadash 117a).