A talmid chacham who stood out in his generation because of his wisdom but sinned and reincarnated, there are certain types of sins1 for which his wisdom will be hidden and not recognizable at all in the next gilgul.

Similarly, all those who learn Torah in this generation are on the level of the generation of the wilderness, with respect to whom it says, "As in the days of leaving Egypt I will show you wonders" (Michah 7:15), alluded to in the verse, "Behold, you shall die with your fathers and this people will rise up" (Deut. 31:16).

This last verse was said by Moses, the soul root of all the people in the wilderness. The juxtaposition of "this people shall rise up" to his death hints to the returning of his and their souls to coming generations in gilgul.

Moses brought the Torah to the world. His entire generation was centered on Torah learning. (Zohar) They are therefore called 'the generation of knowledge'. In general, in each succeeding generation, those who fully devote themselves to learning share their soul root.2

Their wives will dominate them since originally when the Mixed Multitude [that came out of Egypt with the Jews] made the golden calf, these men did not protest. (Ex. 32:3) The women, however, did not want to give their gold earrings to build the calf. (Midrash Raba on Ex. 32:2) They therefore now dominate their husbands.

If two souls from the same root reincarnate into co-existing brothers or friends, then the two of them will be inclined to hate each other and fight, though they may not know why. "Even though they don’t see, their mazel does",

Even though we may not be consciously aware of our spiritual realities, on some level we can sense such things through something called mazel (Meg. 3a) - the guardian angel that accompanies each person. (Rashi Baba Kama)

and each will want to draw from the root more than his spiritual counterpart, so they will find themselves jealous of each other. However, if through Divine inspiration they would see that they come from the same root, then they would come to love one another even though they live at the same time.

As we find by David and Saul, that there was strife between them, even they came from the same root. (See Likutei Maharan) Yet David cared very deeply about Saul.

However, the souls of righteous people who have already died greatly desire to rectify and bring completion to the souls of people living in this world who come from their root. For there is nothing more they can do to become even more complete, so jealousy is irrelevant, as the verse says, "For, there is no deed nor planning... in the grave to which you are going" (Eccl. 9:10). Quite the contrary, there is great benefit for them in the good deeds performed by living people who share their root.

In order to ascend spiritually, it is necessary to descend. (Likutei Maharan II 12) However, once one leaves the world, there is no free will and nothing to bring one down. It requires a certain going down for a soul in the next world to relate to the living. They are very happy to do this, for it facilitates a special degree of elevation.

[Translation and commentary by Perets Auerbach.]