Rabbi Yoel Heilperin is addressed in the Rebbe's correspondence as a dedicated and energetic individual engaged in communal Torah activities, particularly in organizing gatherings that promote Chassidic teachings and unity.
The Rebbe's letter to Rabbi Yoel Heilperin, dated 6 Kislev 5715 (1954), acknowledges receipt of his report regarding the organization of a Melaveh Malkah during the auspicious period between Yud Tes Kislev—the yahrzeit of the Maggid of Mezritch and the celebration of Chassidus—and Chanukah. The Rebbe emphasizes the spiritual significance of these days, highlighting the victory of Chassidus and the light within Torah.
The Rebbe encourages Rabbi Heilperin that such communal gatherings serve as an awakening, referencing the Yerushalmi's interpretation of King David's words: even those who appear to oppose are, in their innermost hearts, connected to the inner dimension of Torah. The Rebbe urges that everyone should contribute to spreading the teachings of the Baal Shem Tov to the fullest of their ability, assuring that even a small effort to reach out to another Jew can reveal their hidden bond with G-dliness, as "when one opens even a tiny opening... Hashem helps and opens it as wide as a great hall."