הלכה על ברכות 41:4

“R. Yehuda says in the name of Rav: whence do we derive that a berakha prior to Torah study is of biblical origin? As it is written: ‘When I call the Lord’s name, ascribe greatness to our God’ (Devarim 32:3)” (Berakhot 21a). The meaning of this passage is that the Torah is comprised entirely of God’s names (Zohar 2:87:1; Tikunei Zohar §10), for He is completely concealed from us, and through the Torah God is revealed to the world. Thus, the Torah is God’s “names” – the way He is made manifest in the world. That is the meaning of the verse, “When I call the Lord’s name” – before studying Torah, “Ascribe greatness to our God” – recite a berakha to its Giver.