When Rabbi Mohilever entered the crowded lecture hall, he looked about at the numerous bareheaded pupils seated before him and began to speak: “I understand that you are proficient in math. Can anybody tell me what the count (“sefirah”) is today?”
The father took the volume in his hand and opened it. “Toldot Yaakov Yosef” by Rabbi Yaakov Yosef of Polonne, the foremost disciple of the Holy Baal Shem Tov. He was seized with horror, for his son-in-law belonged to the sect of the Hassidim.