It is written, “I dwell among My people.” It is impossible for the Creator, the Upper Force or the Light that fills Malchut of Infinity, to relate to one of its parts individually. The system is created as whole and common, and the Light resides only in its totality.
Even in all the degrees of the descent of the worlds, Partzufim, and Sefirot from Above downward, the system remains whole and perfect. Only the extent of the connection among its parts decreases. Therefore, in the descent of the worlds, we are talking about a decrease in the measure of connection among parts in a common system, while the number of parts always remains the same.
As long as a minimal connection, mutual bestowal, remains between them, they still exist in spirituality. However, as soon as mutual bestowal ends and they are no longer connected like one man with one heart (even with the smallest possible heart), this system immediately ends up in this world and the Creator no longer dwells in it. He merely shines from afar with Surrounding Light in order to rouse us to return to unification from this broken state.
From the 1st part of the Daily Kabbalah Lesson 7/14/10, Article, “A Prayer of Many”