All three NR"N can be achieved in a second gilgul if the ruach and neshama were not present in the first gilgul and were not consequently blemished. Concerning this, the Rabbi states in the Chapter Four, Section 3 that he wants to make two distinctions, explaining the first one, a case where most of the Nefesh is not rectified in the first gilgul. This section, however, a second case, concerns a Nefesh which is mostly rectified during the first gilgul.

The first body merits to rectify the entire Nefesh, but later blemishes it.

There is very little tikun left to perform. The Nefesh really belongs to the first body. This is the opposite of the previous case where only a small part of the Nefesh was rectified in the first gilgul. In that case the Nefesh really belongs to the body of the second gilgul. But here only a little tikun is left to do, and the Nefesh really belongs to the first body.

When this Nefesh reincarnates with the Ruach and Neshama into the second body, they do so with the spark of another Nefesh in order to help them perform mitzvot.

As we will see, this additional spark is the main Nefesh of the second body and it will help the first Nefesh complete its tikun while in the second body.

This is called a "Gilgul Kaful" [Double Gilgul]. Rejoice my Nefesh! Rejoice my Nefesh!...

It is called Double Gilgul because there are two nefashot [plural of Nefesh] in one gilgul at one time.

Remember this well.

However, at the time of resurrection the NR"N will return to the first body. The second body will only merit the spark of the additional Nefesh that came, since it was the main [vehicle] for it. The original Nefesh was completely rectified in the first body (and belongs to it). Thus he [the Nefesh of the second body] will have worked for another, as is alluded to by Rav Sheshet who said, "Rejoice my Nefesh! Rejoice my Nefesh! For you have I read … for you have I learned …" (Pesachim 68b).

This will be explained in more detail later in this chapter. In short, he has read and learned Torah for the sake of a Nefesh that was not his own.

[Commentary by Shabtai Teicher.]