Rabbi Moshe the Alter Rebbe’s son lived into his late 80s or early 90s. The Alter Rebbe spoke highly of Reb Moshe’s neshama. For many years he lived alone and in privacy. A Lubavitcher chasid once recognized him during a Shalash Seudos meal in a shul. The Lubavitch custom is for someone to recite a Ma’amar during that time. It was getting late and no one offered to say a Ma’amar. The chasid recognizing Reb Moshe asked him to say something in his father, the Alter Rebbe’s name. He did. “di tzeit loft,” time is running! Everyone broke out in tears.
They cried because they realized their mission on earth of making a dwelling for G-d was lacking. Reb Moshe aroused them to do Teshuva and “get moving.”