Sefer Irin Kadishin relates that one year on Simchas Torah, right after the Hakafos, the Ruzhiner Rebbe zy‑a said, “All of Klal Yisroel is rejoicing with the Torah, and the Torah is rejoicing because Klal Yisroel fulfilled the mitzvos of Rosh Hashanah, Yom Kippur and Sukkos.”
He went on to connect the end of the Torah with its beginning. The last Parshah of the torah is “V’zos habracha”, while the first Parshah is “Bereishis bara Elokim.” When put together, it is saying: The main bracha is to believe that Hashem created and sustains the world. He then offered an alternative explanation: The main bracha is for one to know that he is still at the “Bereishis”, meaning that he is just beginning his avodas Hashem and still has a long way to go.
He concluded by saying, “Moshe Rabenu beseeched Hashem with the words: May it be Your will that the Shechinah rests upon Your handiwork. The word ‘zos’ in ‘V’zos Habracha’ refers to the Shechinah (see Zohar Hakadosh, Chelek Gimmel, 31A). That is the most important bracha.”