The Sukkah-An embrace from Hashem:
Sukkos is the holiday which reveals the inner love experienced on Rosh Hashana. The Sukkah is like an embrace from Hashem. The verse of Min Hameitzar applies on Rosh Hashana while the verse of Merchav Kah applies during Sukkos. That is why the Simcha of Sukkos is done with water the Nisuch Hamayim as the Simcha is form such a high source that it can penetrate even water which does not have Simcha in it of itself.
 Likkutei Torah Netzavim 48b