Saying Goodbye to My Rosh Yeshiva, Rabbi Kalmenson

By Rabbi YY Eisenbach – Shliach to Northwest CT

When the Rebbe sent a group of sixteen young bochurim to New Haven, Connecticut, in Elul 5749 (1989–90), I never imagined that this mission would begin a lifelong relationship with one of the holiest and most refined Chassidim I would ever meet. From the very first moment we arrived at 300 Norton Street, we were welcomed by Rabbi Yosef Yitzchak Kalmenson ע”ה, with the legendary warmth of Reb Dovid Deitsch ע”ה, the founder and underwriter of the Yeshiva. That welcome fabrengen was the start of more than three and a half decades of guidance, inspiration, and friendship with a man whose very veins coursed with Torah, Chassidus, and bitul to the Rebbe.

Rabbi Kalmenson could have easily ascended to the position of Rosh Yeshiva in any major Lubavitch institution in the world. His knowledge of nigleh and Chassidus was vast, his shiurim overflowing with clarity and depth. But with his trademark humility, he chose instead to serve as the Rebbe’s Shliach to New Haven, giving his heart and soul not only to a small community that at the time numbered barely a dozen families, but also to generations of bochurim who would pass through his Yeshiva. For each of us, he was not only the rosh yeshiva, the mashpia, and the community Rav — he was also a friend.

What struck me most was the simplicity of his selflessness. On Fridays, despite his many responsibilities, Rabbi Kalmenson would be out on Mivtzoim with the same youthful energy as a bochur just starting his shlichus. For him, shlichus was not a title; it was life itself.

I had the unique privilege of being the first — and for many years the only — emissary student of his who remained in Connecticut after marriage, continuing on shlichus under my dear father-in-law, Rabbi Gopin, the first Merkos Shliach to Connecticut. And so, over these thirty-five years, my connection with Rabbi Kalmenson deepened. Every time I would visit the Yeshiva, he would insist that we sit and learn together. It didn’t matter how much time had passed — within minutes it was as if we had never left off. His passion for learning and for teaching was unquenchable.

The Rebbe teaches us והחי יתן אל לבו — that when someone passes, the living must take their life’s message to heart. In this spirit, I want to share a few of Rabbi Kalmenson’s qualities that left an indelible mark on me and on so many others.

Torah – Kol Kulo Torah

Rabbi Kalmenson would often remind us as bochurim: “After you get married, you’ll have plenty of time for mivtzoim. But now, the Rebbe wants you to be kol kulo Torah — to immerse yourself entirely in Torah study.” He himself lived this principle fully. His life was saturated with Torah; he was maleh v’gadush both in nigleh and in Chassidus. His insights, later published in his Reshimos Shiurim across the entire Shas, bear witness to his greatness. But even more than his knowledge, it was the way he learned and taught that inspired us: with humility, with joy, and with the conviction that Torah is not a subject but the very essence of life.

Hakaras HaTov – Endless Gratitude

One of the themes Rabbi Kalmenson repeated constantly was hakaras hatov. We were all recipients of the extraordinary kindness of Reb Dovid and Sarah Deitsch ע”ה, together with their daughter and son-in-law, Dr. Josh and Mrs. Sandman and then with his grandchildren Yasef & Bassie Deitsch, who devoted themselves to the Yeshiva and this sacred mission. Rabbi Kalmenson never ceased to remind us of the gratitude we owed them. He would tell us, “You must always go the extra ten miles for the Deitsch family.” For him, hakaras hatov was not a polite nicety — it was a bedrock principle of Chassidic life. Watching him express appreciation with such sincerity shaped how we, too, tried to live.

Ahavas Yisroel – A Heart Open to Every Jew

Perhaps nothing captured Rabbi Kalmenson more than his ahavas Yisroel. Just this past Motzei Shabbos, as I arrived in New Haven for the funeral, I encountered a Yid sobbing uncontrollably. He told me that Rabbi Kalmenson had visited him every Friday for years. To him, Rabbi Kalmenson was not just a rabbi — he was like a parent. That encounter reminded me of our years in New Haven as students, when we ourselves felt this same love. If we needed material help, he was there. If we needed spiritual guidance, he was there. He gave with humility, with sincerity, and with the genuine warmth that only a true Chossid can give.

A Life of Shlichus

Beyond all the roles he played — Rav, Rosh Yeshiva, Mashpia, teacher, writer — Rabbi Kalmenson’s life was defined by shlichus. He wore every hat because the Rebbe needed him to. He carried the burden of a community, a Yeshiva, and countless bochurim, and he did so with kabbolas ol and unwavering devotion. That image of him heading out on Mivtzoim each Friday, a smile on his face, is etched in my heart. It is the perfect picture of a Chossid who lives every day with the Rebbe’s vision.

The Loss and the Legacy

This is an immeasurable loss — for his family, for his students, for the Connecticut community, and for the wider Lubavitch world. Yet we are not left with emptiness. Rabbi Kalmenson’s life was one of fullness: fullness of Torah, of gratitude, of love, and of shlichus. Those who learned from him — and we are many — now carry the responsibility to infuse these qualities into our own lives.

As Chassidim, we know that death is not the end. His neshamah continues to ascend mei’chayil el chayil, from strength to strength. From that higher place, may he shower down blessings on his family, his talmidim, and all of Klal Yisroel.

And may we, inspired by his example, hasten the day of eternal joy with the Geulah with Moshiach now.