Yehuda Ashlag quotes
[A]ngels made no complaint about any of the creatures that were created during the six days of Creation, except about Man. This is because he was created in God's image and consists of Upper and Lower together. When the angels saw it, they were startled and bewildered. How would the pure, spiritual soul descend from its sublime degree, and come and dwell in the same abode with this filthy, beastly body? (...) The answer that came to them is is that there is already a tower filled abundantly, and empty of guests. To fill it with guests, we need the existence of this human, made of Upper and lower together (...) Know that this tower, filled abundantly, implies all the pleasure and the goodness for which He has created the creatures.
Yehuda Ashlag
[S]ince the essence of the soul is but a will to bestow, and all its manifestations and possessions are fulfillments of that will to bestow (...) therefore it is immortal and irreplaceable. The soul, with all its manifestations is eternal and exists forever. Absence does not apply to them upon the departure of the body. On the contrary, the absence of the corrupted form of the body, greatly strengthens it, thus enabling it to rise to the Heavens. Thus we have clearly shown that the persistence in no way depends upon the concepts it has acquired, as philosophers claim, but its eternality is in its very essence, meaning in its will to bestow, which is its essence. And the concepts it acquires are its reward, not its essence.
Yehuda Ashlag
A thought is an upshot of the desire. When someone thinks about what he wants, he does not think of something undesirable. For example, a person never thinks about the day of his death. On the contrary, he will always contemplate his perpetuity, for this is his desire. Thus, one always thinks of what is desirable (...) It turns out that thought serves desire, and desire is the "self” of the person. Now, there is a great self, or a small self. A great self dominates the small selves. He who is a small self has no dominion whatsoever, and the advice is to magnify the self through the diligence of the thought on the desire, since it grows to the extent that one thinks of it.
Yehuda Ashlag