Everything begins and ends in the vessels that we have to prepare. The upper Light is in a state of absolute rest, which means that the wholeness exists from the start. However, by our deficiencies, by our exertion, we spur this wholeness to leave the source and to be revealed 620 times more than the form of the spark in which it hides.
All the Light of Ein Sof (Infinity) is the lowest, minimal level, Nefesh de Nefesh, which exists before we begin to demand it. Through our demand, by the deficiency in the vessels that we have expanded, we turn this Light into NRNHY de NRNHY. So, everything depends on the extent to which we have prepared our deficiencies.
Blowing the Shofar symbolizes Rosh Hashanah (the New Year). This means raising the beauty (Shufra) of bestowal, love, and connection of the Creator’s attributes. This makes it a reason for a holiday: Our ability to raise ourselves and to prefer the attribute of bestowal, instead of the attribute of receiving.
Thus, we prepare the right vessel inside us and begin the new year, the new phase, the new level. This is a law for Israel, which means for those who want to ascend Yashar El (straight to the Creator) according to the three lines.
From the 1st part of the Daily Kabbalah Lesson 9/19/12, Writings of Rabash