“The Baal Shem Tov came to a city to pray in the Beth HaMidrash. In his prayer he sighed deeply. After the prayer Rabbi Moses, the head of the court of that holy community, asked him, ‘Why did I hear a deep sigh from you during the prayer?’... The Baal Shem Tov told him, ‘The truth is, it was a sigh from the heart.’ He said, ‘The mezuzah is defective.’ The Rabbi found that indeed it was as he said.”

“Once when the Baal Shem Tov was in the holy community of Nemirov, he was going from a big room to a small room, and by mistake he went to the cellar. He entered the cellar and ordered that the mezuzah be checked. A man asked him, ‘And if a man goes astray should he immediately attach some cause to it? Perhaps it is an accident?’ The Baal Shem Tov answered him, ‘There are no accidents, as far as I am concerned.’ ”