Having explained the forms and likenesses in which the Sefirot appear in the prophetic vision, we will now discuss what relates to the Sefirot in themselves and their various attributes.
The existing structure of the Sefirot – the entire structure of the different levels...
The Supreme Mind (המחשבה העליונה, HaMachshavah HaElyonah, lit. the Highest Thought) calculated how to make man in such a way that he would have intelligence and a good inclination, and also an evil inclination that he can control. The Supreme Mind calculated how to give man a method of service through which he can earn merit, or how to punish him until he becomes fit, so that afterwards he may receive his eternal reward. Each one of these matters involves many details. What we must understand is that the Supreme Mind calculated exactly how many levels were necessary to attain this object, and He made this precise number of levels, not one more and not one less.