The Rebbe thanks for the update and donation toward printing the Rebbe Rayatz’s works, and expresses hope that the son continues putting on tefillin as discussed. He shares a Purim message: by holding firmly and proudly to our Jewish identity, like in the days of Haman, we merit transformation from sorrow to joy and true redemption.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/adar_beis/946