There is a special reading for the Shabbat Chol Hamoed Sukkot. It is from parashat Ki Tissa.
The story is that Moshe asks G-d to show him the way so he can find grace in his sight and connect to the nation. Moshe also tells G-d that if he does not reveal himself then the nation will not go up to the Land.
It is strange because a verse prior to that (just before the beginning of this reading (Exodus 33:11) it says "וְדִבֶּר יְהוָה אֶל-מֹשֶׁה פָּנִים אֶל-פָּנִים, כַּאֲשֶׁר יְדַבֵּר אִישׁ אֶל-רֵעֵהוּ", "And G-d spoke unto Moses face to face, as a man speaks to his friend"
The Torah is the laws, our guidance and it has rules, judgments. This is the face of G-d Moshe was seeing. Moshe knows that it would be hard for the Yisraelites to come to the land only with the Torah so he asks G-d to reveal the side of Mercy, the thirteen attributes that can save them in time of judgment.
The verse that begins with the thirteen attributes starts with the word "וַיַּעֲבֹר". This word is built from "עב" =72 and "ריו" =216. Together they are the numerical value of "חסד" and "גבורה". The sefirot that represents the right column and the left column. Putting them together creates balance.
There is more to it but the importance is to understand that Moshe did a good job for us to draw that energy of mercy and balance. We used the thirteen attributes many times during the last weeks to cleanse and draw mercy to us during Rosh Hashanah and Yom Kippur.
Sukkot is one of the three Holidays, "Regalim", that we need to attend and be seen in the Holy Temple. The Sukkah is the tool like the Holy Temple. It connects us to the light of Mercy and to the Holy Temple energy.
Having a Sukkah is good but sleeping, eating and studying in it makes a greater connection to draw the light of mercy to us for the whole year.