R' Tzadok brings that the first time a concept is mentioned in the Torah is the
shoresh of that inyan. The word "Kahal" appears for the first time in the Torah
in Shemos 12, in the context of Korban Pesach.
The Sidduro shel Shabbos at the end of Shoresh 6 Anaf 1 explains the statement
in Tehillim "Tehilaso b'Kahal Chassidim" that through Kahal, the gevuros become
chasadim. He explains that in KH"L the H = the five gevuros, and the K-L = the
five chasadim (5x26 [Shem Havaya"h] = 130. Note the significance of a other
130's, such as "Tzam' - fasts turn gevuros into chasadim). He alludes to what is
brought in seforim that in davening, a t least, one should clasp one's left hand
with and envelope it in the right - enveloping the gevuros in the chasadim.
This past Purim I expounded on the idea of "NiKHaLu ha'Yehudim" as the
fundamental concept of Purim, and that many of the incidents in Purim took place
in various forms of "chatzer". Indeed, the first place in Tanach that Adar is
mentioned is in Parashas Mas'ei: "Chatzar Adar".
The Chatzer is the Outer World, removed from the direct presence of the King -
whether it be Achashveirosh or HKB"H.
Chatzer also tells us how to deal with the Hester Panim inherent in that
distance from HKB"H. The R represents Rah, the Evil that springs from the
concealment of HKB"H's presence. CHaTZeR = Chetz Rah, split the Rah in half.
Half Rah = Kahal (270/2 = 135). The response to Rah, and the manner in which one
breaks through that concealment, is by unifying the Kahal (135) in Tzom (136),
Kol (136), Mammon (136) - the KHL plus the agent of yichud (known in gematriyah
as the "Kollel").
Adar is a time of Chatzar, but Nisan is a bechina of "Hevi'ani ha'Melech
Chadarav" - the great Ohr of the Seder night. Lo l'chinam did the actual event
of Purim occur on Pesach! The mitzvos of Kiddush ha'Chodesh and Korbon Pesach
united Am Yisroel: first via the Beis Din concept, then via each and every
individual. The Korbon Pesach is done en masse and eaten b'chaburah. Ho b'ho
talyah. The Ohr only comes to a Kahal and only a Kahal can be zocheh to the Ohr.
Tein l'Chochom v'yechkam od...