Ha'azinu: Chapter 27
Undisclosed Da'at, Da'at that is shining in the head, expanding Da'at

Rabbi Shimon tells us about the three types of Da'at in Zeir Anpin, and he also talks about how God established a testimony in Jacob. Rabbi Shimon tells the other rabbis that he has known these matters for a long time but was afraid to reveal them, and now they are revealed. He laughs and weeps over what he is and is not allowed to reveal, and he says that he has only this one day at his disposal to tell what he wants to tell. And we find that he wants to reveal things so that he will not enter the World to Come in shame.