The Torah, “Exodus, (Tetzaveh),” (Command), 27:21: In the tent of meeting, outside the dividing curtain that is in front of the testimony, Aaron and his sons shall set it up before the Lord from evening to morning; [it shall be] an everlasting statute for their generations, from the children of Israel.
It’s written about human properties, since humans encompass the entire universe, that it’s as if they collect everything there is inside themselves: inanimate, vegetative, animate, and speaking nature. The speaking nature consists of “common people,” meaning the simple desires of a speaking level and the desires that are oriented towards the Creator; they are called “Israel,” intentions focused straight towards the Creator.
Among these desires, there are some that refer to Levites and Cohens; they personify the lower and upper parts of the spiritual Partzuf, a transcendent system. Aaron represents the highest part of the spiritual system, its right side.
From KabTV’s “Secrets of Eternal Book,” 8/19/13