דברי קהלת" 1:1 Koheles - ספר המגיד"
"בן דוד מלך בירושלים" We Lain Koheles on Sukkos because it teaches us the difference between real happiness and that which is perceived to be happiness but is really wasting life on meaningless things. Sefer Koheles implores us to follow the path of true happiness, the path of the Torah Hakdosha.