Sukkos Partnering with Hakadosh Baruch Hu

What makes the sukkah so special that the Gemara gives it the holiness of a korban, and a Midrash calls whoever sits in it a partner in creation? The four species already let us thank Hashem for the harvest, so why add a mitzvah that sends us out of our homes right when the work is done? The Meshech Chochma divides mitzvos into two kinds, and Rav Eliyahu Lopian explains why Har HaMoriah holds a holiness that Har Sinai did not. A friend standing at the funeral of a young man saw something at that moment that puts our daily choices in perspective.