Having introduced the subject of ascents and descents, we will now examine their nature.
This proposition consists of two parts. Part 1: The Emanator… This explains the concept of the Additional Soul. Part 2: Correspondingly… This explains the corresponding ascents in the Sefirot.
Part 1: The Emanator, blessed be His name, instituted a certain law… This is something that we actually find in man here below, and from it we can understand the meaning of this ascent of the Partzufim, for what is hidden can be inferred from what is explicit.