LEV868 When a close relative of a regular Kohen dies, the Kohen shall become spiritually impure to mourn and to attend to the needs of the deceased corpse, as any Jew whose close relative dies. When a close relative of a regular Kohen dies, there Kohen has a mitzvah and obligation to become spiritually impure through the nearness to the corpse that results from mourning and from attending to the needs of the deceased's corpse. The six relatives are his mother, father, son, daughter, brother and sister. The Rabbis added that the same requirement exists in the event of the death of his wife. When any such close relative dies and the Kohen does not want to fulfill this mitzvah because he wants to retain his spiritual purity, we oblige him to become impure and fulfill the mitzvah. Every Jew has this obligation to mourn and to attend to the needs of the corpse when the deceased is one of these relatives. Key concepts: Sometimes, owing to his physical nature, when something happens to a person he is not moved by it emotionally until he does an act that brings his emotions to the surface. Therefore, the Torah commands that when someone dies, his close relatives, who naturally loved him, must perform actions that will stir them to reflect upon why this suffering befell them. The prescribed acts of mourning help them to realize that their sins were the cause of their woe, for never does Hashem bring suffering or pain on anyone unless he is guilty of sin. This is a basic tenet of our faith. The required mourning and reflection upon it bring the mourner to repent his sins and improve his way to the best of his ability. Another benefit of the mitzvah is as follows: Non-believers attribute death to chance, as if just as animals die, people die. In order to prevent such a thought from entering our minds and to uproot it if it is already present, the Torah obligate special procedures for mourning.