Musar su Esodo 33:13

There is a hint here that man should not be influenced when it appears to him that the righteous suffer and the wicked prosper. G–ds ways are just in all His paths and He dispenses true Justice. He is a true G–d, keeps faith, and there is no crookedness in His judgments. Moses requested from G–d that He should reveal to him how His paths work. (Exodus 33,13) G–d explained to him that when one observes that a צדיק enjoys the life on this earth, this is a sign that the צדיק in question is also the son of a צדיק. When one observes a צדיק experiencing afflictions, he is the son of a wicked person. When a wicked person enjoys the good life, this is because his father was righteous, whereas if the wicked person suffers hard times it is because his father before him was also wicked. The Kabbalists explain this answer of G–d in terms of גלגל הנשמות, transmigration of souls. The reincarnated soul is called “בן” without reference to the biological father-son relationship. Any soul inhabiting a body because it has to atone for sins of a previous life, is called the "son" of the person whose body it inhabited in that previous life.