Part 2: The letters constitute a complete order... Each root that we can identify as serving a particular purpose or function is ordered appropriately in its own unique way, and everything that has to pass through the root in question must enter into this unique order. Since the letters are the root through which what is conceived in thought is executed in actuality, when the thought is ready to be implemented, it requires the order of letters...which exists to bring all things into actual being.
The letters do not stand as part of the governmental order in the same way as the attributes and Sefirot, which define and shape it. Rather, the purpose of the letters is to put into actual effect the governmental order already prepared on the level of thought. The order of the letters is so arranged as to ensure the fulfillment of the executive function dependent upon it.