In the Zohar on the Geula (chapter 25) , we learn about how Hashem's oneness will be revealed when Moshiach comes; thereby, the Erev Rav will be separated, and the pristine unity will be revealed. Both Temples were destroyed caused by the separation of the Shefa of Binah and Yesod.
The sweetness of the "tree of life" will finally manifest within the Torah, transcending the "tree of good and bad" consciousness to reveal Hashem in the world.
