Where Do Matter And Spiritual Intelligence Intersect?

Question: How do the two realities intersect: matter and spiritual intelligence?

Answer: At each step of the spiritual ladder, matter and spiritual intelligence form two opposite mutually complementing systems and form a common whole.

Therefore, they are called three lines: one of them is Light, the second is desire, and between them there is the third line that unites them.
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From the Kabbalah Lesson in Russian, 3/18/18