Shiurim in this topic
Dr. Ullman is addressed in the correspondence of the Lubavitcher Rebbe as a medical researcher, specifically engaged in cancer research, and as someone involved in supporting and spreading Judaism within his community.
The Rebbe’s letter to Dr. Ullman, dated 21 Shevat 5715 (1955), acknowledges receipt of Dr. Ullman’s earlier communication and expresses pleasure at the news that a colleague, Dr. Zuber, is prepared to assist him. The Rebbe notes with surprise that Dr. Ullman did not mention his activities in supporting and disseminating Judaism in his locality, emphasizing the importance and eternal value of every positive action in this realm, as taught by the Alter Rebbe in the Tanya.
The Rebbe draws a parallel between Dr. Ullman’s professional work in cancer research and his communal efforts. He explains that just as a single cell’s abnormal growth can affect an entire organism negatively, so too, even a seemingly minor positive action can have far-reaching, positive effects on the entire community. The Rebbe encourages Dr. Ullman to recognize both the merit and responsibility inherent in every good deed, urging him to continue his efforts and to share good news regarding his activities.