The final Sefirot or energy level that the light reaches as it descends an unfolds is the Tenth Sefirot which is known as  Malchut (Kingdom). It is at this level that the original thought or idea which emanated from it source gets expressed in the real world of action.

There is a concept that attempts to explain such esoteric concepts as the descent of the soul from is place in the  spiritual world. According to this idea, there is something  similar to a funnel (or well or souls) where neshomas (souls) come down from the spiritual world into vessels (or bodies). As a Jewish nation we are commanded by G-d to be fruitful and multiply. It has been explained that the most exalted or elevated souls sort of float on the upper level of the funnel (well of souls). While the crudest, or most lowly of  the souls are to be found towards the bottom of the well of souls. The souls descend from their highest level (vessels or sefirot) to fall down to their lowest level, the Malchut, which is what we understand to be the human body, here in this world.

It has been explained that the lowest of the souls must fall to their appointed vessels before the highest of souls can be drawn from Shemayim (the spiritual world). This in effect creates the sort of vacuum which may be necessary to draw down the highest level of souls which may be understandably reluctant to come down to this limited and finite world. This is an idea which I have learned which explains that this is an instance where the exalted, must wait for the lowly, in order to achieve their final descent from the supernal world to this finite world or ends or action.

AhMbDvd, April 8, 2010