[Rough translation] So with this there is no doubt, that the Ruachs and Neshamas of Tzaddikim, which are bound with life ('Tzarur HaChaim'), each one of them in the source of where their soul is located to that Tzaddik, that they (the Tzaddikim) are with Hashem [in Gan Eden], and we do not say that they lower themselves from their elevated place at all. Rather, the parts of their souls (their Ruachs) that they have already perfected, those parts remain down there (where their place is), in every level in Yetzirah, and they do not rise all the way up (as we described what happens with the Nefesh because of the Klipot in Asiyah).
So these (Ruachs and Neshamas of Tzaddikim) come down and come into a person in the form of an Ibur, to help him as we described. And his main Ruach soul which is higher up [in Yetzirah] because he acquired it through his actions, it is and continues to be bound in life, and it does not descend from its place. So too with the Neshama of the Tzaddik, etc.