…whereby their exterior – which is the root of man’s body – receives an interior soul… This is what happens in the ascents of Shabbat and all the other ascents in which the interior and exterior are not renewed together but rather, the existing exterior receives a different interior. …beyond what is due to it according to its intrinsic nature… Even without this addition, the Partzuf already has full power on its level; the addition only increases its importance.
It could be objected that numerous differences exist between the Additional Soul as found here below and the root to which we have traced it in the world above.