Answer: The structure of the Sukkah and all of the materials that are used to build it are according to the method and measurements of the upper attributes that we need to awaken in ourselves.
The roof of the Sukkah is collected from raw branches of trees so that the shade on a sunny day will be greater than the light, and the light will come only occasionally through the branches and leaves.
The roof symbolized the Masach (Screen) that separates us from the upper world, and the light that fills it. But due to that, we form a spiritual Masach within ourselves. We as if neutralize the upper Masach.
The upper Masach is one that conceals, and our Masach is one that reveals. Thus, during the time of the neutralizing of the upper Masach by our Masach, the light begins to illuminate and correct us.
During the seven days, we gradually fill with this light, and on the eighth day, we come to the state of being completely corrected, the holiday of Simchat Torah (Rejoicing of the Torah). This means that the light of the Torah reaches its logical and only end: the filling of the Kli (vessel) of the corrected soul.
Question: We always talk about the importance of spiritual acts and not physical ones. So, why did your teacher, the Rabash, treat the building of the Sukkah so passionately, to such an extent that he checked if the roof was hanging and not connected to any poles and so on
Answer: This is the way a person is. If something is valuable to him, then he relates to it with great consideration, even on the lowest physical level.
If the deep inner motivations are very dear to us, then we maintain the same reverent attitude to their symbols in our world. Of course, what is most important are the spiritual corrections. But when a person begins to work internally, then the inner symbols become an incentive that attract him to suitable external actions.
Besides that, the holiday of Sukkot is simply a good and happy holiday. People gather together in a Sukkah, dine together, sing songs, and are happy.
There will come a time when the entire world will enter a huge Sukkah, and then the entire world will be happy.
From KabTV’s “Secrets of the Eternal Book” 6/18/15