Musar su I Re 22:21

In this portion the Torah discusses matters that help perfect one's body. The body viewed as the sheath of the soul, has also been created in the image of G–d (Genesis 1,27). This is why if someone kills another creature created in G–d's image he himself will be killed as an appropriate act of retribution. By his deed he has separated a soul from its body, (sheath), hence his own soul will be separated from its sheath. The act of murder is viewed as if the murderer had also severed the life of the soul in the Celestial Regions from its "body" in those regions. Although such separation would have occurred sooner or later anyways [by the natural death of the victim. Ed.], the murderer is punished for having brought this about prematurely. Hence his own soul will not find its resting place until the murder has been avenged. This principle explains the strange story related in Kings I chapter 21 of the judicial murder of Navot through Jezebel and king Achav. We are told in Kings I 22,21, that the "spirit" of the slain Navot volunteered to seduce king Achav into sinning by listening to his false prophets and that the Heavenly Tribunal concurred in this act of deviousness by the "spirit" of Navot. As a result, Achav was killed in a battle with Aram which served the ostensibly patriotic purpose of recapturing the city of Yavesh Gilead (which the Aramites had wrested from the Jewish state some considerable period earlier). Clearly, the soul, i.e. רוח, of Navot had not been able to come to rest due to the premature death of its body, and this may be why the רוח was permitted to act in its own personal interest. Avenging the murdered person is the only means to restore the harmony that existed between body and soul prior to the murder. We can now understand why, even if the family of the victim or the court were to agree to it, payment of a ransom would not restore the equilibrium which had been upset previously.. As long as the victim of the murder has not been appeased, there can be no question of the deed having been atoned for. When the death of the victim is due to an unintentional act however, the Torah does not consider him guilty of bloodshed. Clearly, the death of the victim was an act of G–d, i.e. the attribute of Justice chose as its instrument someone who had committed some other undetected offense. The killer had unconsciously carried out G–d's design in all those cases where he had not planned to kill the victim with a lethal instrument. The killer has to flee to the city of refuge, one of the cities of the Levites. Those cities are regarded as sites of judgment. The Levites themselves represent the emanation גבורה in the pattern חסד-גבורה-תפארת, a pattern that corresponds to the respective levels of כהן-לוי-ישראל. This unintentional killer must remain in the city of refuge until the death of the High Priest (35,25). This is because when the body of the victim was slain, also his soul was taken from him and had to remain in exile until a time when G–d is in a favorable frame of mind. At the time the High Priest dies, when his soul ascends to the Celestial Regions, the soul of the murder victim is then also allowed to proceed to those regions.