However, after the levels and their interconnections were laid down, now that we know that they are all directed only towards the ultimate goal, we can then investigate the function of these levels within the scheme of government. We can examine their purpose and study their constant forward movement towards the overall goal.
In short, we cannot ask for a reason why the Sefirot exist and have this structure, because there is no better reason than the fact that this is the way it is. With exactly these levels arranged as they are, and through man’s emergence from them on his appropriate level, he emerges with precisely the nature that it was required that he should have.