This story was told by a certain young man to a bochur in Crown Heights and was repeated by Rabbi Dovid Pape at a farbrengen in 770:
My mother used to work in Crown Heights by Freida, the local wig salon. One day someone calls on the phone and asks to speak with Freida.
“Freida isn’t here right now,” my mother told the caller, “I can take a message.”
“Please tell her Mrs. Schneerson called.”
“Oh”, says my mother, “are you related to Rabbi Schneerson?”
“He’s my husband.”
My mother was elated, “What an honor it is to speak with you.”
“Excuse me,” said the Rebbetzin, “do I hear a note of sadness in your voice. Is everything all right?”
“Well, to tell you the truth,” said my mother, “my mother is very sick in the hospital. She has the known disease and the doctors only give her 3 months to live.”
“Oh,” exclaimed the Rebbetzin, “don’t you worry! Your mother will get better and she’ll live for good long years.” And so it was – my grandmother recovered and lived until her 90′s.
