In spirituality, “mutual inclusion” is an action that is carried out by a force that comes from the Creator. Although our qualities tune into each other, the mutual inclusion does not happen outside of us since it is impossible to accomplish on our level. I cannot take two qualities and fuse them together in one plate here on the table before me. I need to raise them to the source where they can unite into one whole in the Creator. I can work on their mutual inclusion there.
My desire to include these qualities is here in this world. However, in order to create their mutual inclusion, I need to raise them to the root (Keter) of the given degree and connect to the place where they exist as one whole. This is not a material unification where a few atoms unite into one molecule and create a compound through a chemical reaction.
In spiritual unification, nothing remains from the right and the left lines. The middle line is a completely new entity. It does not consist partially of the left line and partially of the right. Rather, mutual inclusion produces a new quality that supersedes the qualities of which it is made.
The desire to enjoy (which connects to the screen) and the Reflected Light (the intention to work for the sake of bestowal) are depicted as a desire below and a screen above (the intention to bestow), as if the intention and the desire exist separately. They are depicted as if these are two separate components rather than one whole.
However, this explanation is only provided in this manner when using the terms of our world. In the spiritual world, the intention and the desire are forced to be completely inseparable, intertwined, and merged inside one another. The intention can completely change a desire by using it for the sake of reception or for the sake of bestowal.
Therefore, the work we do on the “third day” lies in merging with one another and creating one common body. Each person does the inner work of uniting his qualities from the right and the left sides into one whole in the middle line, tuning in to the Creator as a result. After all, the source of all these opposite things is situated in Him, where they all exist in unity. This is why on the third day, upon ascending to the Creator, a spiritual quality opposite to the Creator was revealed, which is the spiritual death of desires such as Shachem.