Various reasons could be found for the particular degree of action in any given case, because this has ramifications in various spheres. This is not among the things it is forbidden to ask. On the contrary, we could find many reasons, and all of them could be true. For the Supreme Thought did not have only one intention but many – except that we have no need to investigate this at all, but only to understand “what”.
For example, when we say that Zeir Anpin starts from the chest of Abba and Imma, it simply means that this is how it is: this is the extent to which Zeir Anpin clothes Abba and Imma – from there and below – and all the aspects of the world that depend on this follow the same order. But if you ask why Zeir Anpin does not start from Daat and below, this is not a question. Even if you could find an answer, the inner reason would remain unknown.
As we have said already, the Supreme Thought had various intentions and we have no need to investigate them but only to know what He laid down and built, and the effects of the structure as it stands. (It is permissible to investigate how one power is clothed in another because this teaches us about the functioning of the governmental order of this world, which relates to man’s service. However, it is forbidden to investigate the reasons for the present governmental order.
This is because the World of Service exists in order to attain the reward, and therefore the reasons for its governmental order lie rooted in the World of Reward – the world of perfection – of which we can have no conception.)