NOTES for Num 3:1-51
The Book of Numbers clearly lays out all the duties of the Levites at the Tabernacle, taking into account all the clans of the tribe of Levi. Everyone has a place and a task, and for each person that place is defined clearly and unambiguously. It may seem that this is a complete absence of freedom, religious formalism that one could easily do without. We ourselves often think that when it comes to God's work, there is no need for clear regulation or clear organization of the work process, that God will somehow "arrange everything Himself" - after all, it is His work.
Perhaps, if we were perfect people or spirits, that would be so. Then there truly would be no need either to plan the work or to organize it externally: a direct command from God, adequately received by those carrying it out, would be enough. We, however, are fallen people with all the consequences that follow from that. This applies, in particular, to organization. Unfortunately, we usually do not hear God's commands directly. And if they are to be transmitted through someone, then at the very least that one person must be at the head of the whole work and must bear responsibility for it.
In addition, rhythms and algorithms play a large role in the fallen world. There are too many automatisms in our lives, and they appear where and when our actions and our awareness diverge. At the Tabernacle everyone had to be, first of all, one who stood before God - for everything he did was done in God's presence. Meanwhile, regularly repeated ritual actions in the sanctuary easily turn into routine, becoming those very automatisms. If a person knows in advance exactly what lies before him, what he intends and must do before God, he has more opportunity not to slide into that routine.
One can escape automatism either into complete unpredictability or into absolute monotony, the kind that makes one's jaw ache and therefore cannot go unnoticed - while automatisms are frightening above all precisely because they go unnoticed. A monotonous religious ritual is bearable only when the action is fully conscious at every moment of its performance. This, of course, does not come easily, but all the conditions for it were created at the Tabernacle. The rest depended on the ministers themselves.