Descent – Ascent

Question: Why do we need to descend in order to ascend higher over and over again?

Answer: It is because if it weren’t for the descent, we wouldn’t mobilize new desires, new empty volumes that we can fill by our next ascent and the revelation of the Creator.

This is the reason that the constantly alternating states of descent-ascent, descent-ascent are necessary, and what is more, the depth of the descent is equal to the height of the ascent.
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From the Kabbalah Lesson in Russian 3/13/16