R. Eliyahu Baal Shem gives R. Avraham Moshe a set of instructions to arouse his great-uncle Moshe to teshuva. When he puts up a mezuzah on the front door of Moshe's house, this opens up the gates of repentance. As the Baal Shem Tov concludes the story 160 years later, the mysteries of hashgocho protis, Divine Providence, are revealed in all their detail, right down to the drink of fresh springwater R. Chaim Rappaport had enjoyed just a few weeks earlier on the site of the ruined estate of R. Moshe, son of R. Shmuel Tzadok.