Thus we find that when the Supreme Will wanted to display His powers in this way, He adopted the way of the human mind, even though He did not need to. Humans go through a series of thoughts, one after the other, in accordance with a certain pattern, stage by stage, even though God could have created everything with a single utterance. But He wanted to show how each power develops, from where it emerges, what is its overall cause and what it is that produces its various specific details and everything else that can possibly be discerned in it.
Accordingly He so ordered His powers – i.e. those that relate to the creation of the worlds – in such a way that they should function in this way we call the way of male and female, just as the powers of the soul function in the soul itself (through Chochmah and Binah, which are in the category of male and female). The Partzuf is the way in which the causal agent must stand in order to be fit to draw forth and reveal its effect.
In this way the various powers of the soul themselves become differentiated into their particular components, and then they have the power to produce new effects. If not, they would not have this power.