Rabbi Shimon said, I have not revealed everything in the Greater Gathering of Naso, and all these matters were hidden in my heart until now. I wanted to hide them for the world to come, since there in the world to come we are asked a question of wisdom, as said, “And he shall be the stability of your times, a store of salvation, wisdom and knowledge” (Yeshayahu 33:6), for they seek wisdom from him. He therefore withheld matters for the world to come. Now I see that the Holy One, blessed be He desires it, to reveal them, so I will enter without shame before his palaces.
The Lesser Holy Assembly and Its Grand Vision
Idra Zuta 1:69