Now we will describe the difference between the gilgul of a Tzaddik and a Rasha, and this this, we will understand a a piece of what we find in the pesukim and the divrei Razal. Sometimes we see that a person cannot reincarnate more than three times, in the secret of what is written that sometimes it takes three times to succeed. And this is the secret of what is written, "על שלשה פשעי ישראל ועל ארבעה לא אשיבנו."
This is also what is written that, "the sins of the father are visited on his children until the third or fourth [generation]." However, we find in Sefer haTikkunim, Tikkun 69, that a Tzaddik can reincarnate until one thousand generations, etc. So we can understand from the passuk itself that the concept of "four generations" refers to the rasha, just as it is written, "the sins of the father are visited [on his children, until the third or the fourth generation],"...the fourth generation for those who hate me. However, he who does Chesed, he can reincarnate a thousand times [because he] loves me, and he protects my mitzvot.