“When a person repents, forgiveness is granted both to him and to the whole world (Yoma 86b).” How does one person’s repentance bring about forgiveness for the whole world? This happens because the penitent awakens thoughts of Teshuvah in the hearts of others. But not everyone has the capacity to be this one person. Such a person has not yet existed, for that unique person will only be the Messiah, the son of David. His soul must comprise all other souls. Otherwise a person’s thoughts of Teshuvah cannot evoke thoughts of Teshuvah in others who are unrelated to his soul. Moreover, it is necessary for the thought of repentance to affect all aspects of his soul. One who encompasses the entire world possesses the plenitude of powers of the entire world; and if he repents with only one power, he can arouse repentance only within those others who are dependent upon this one power. King David possessed a soul that encompassed all other souls, for he was the “Fourth leg of the Di...