The holiday of Sukkot symbolises a cover, an anti-egoistic screen under which the desire to receive pleasure is hidden—a whole person. Sukkot is a symbol of internal work in a corrected way: the desire to receive pleasure under the restriction and the screen. A person makes sure that the shadow is greater than the light of the sun, sitting in the Sukkah for seven days according to the seven Sefirot: Hesed, Gevurah, Tiferet, Netzach, Hod, Yesod.
Until one corrects them all and comes to the holiday of Simchat Torah (the Joy of the Torah), that is, until one pleases the Creator by correcting his desire to receive pleasure at this stage and moves closer to the end of correction.1
From the Daily Kabbalah Lesson 9/27/18, Lesson Preparation
1 Minute 12:20