Published in Song of Teshuva, a commentary on Rav Kook’s Oros HaTeshuvah by Rav Moshe Weinberger and adapted by Yaacov Dovid Shulman.
Rav Weinberger tells over the following story (pages 134-135):
When Rav Yosef Ber Soloveitchik went to a farbregen (a Chassidic gathering) on the occasion of the Lubavitcher Rebbe’s eightieth birthday, he was very impressed by the Rebbe’s brilliance and erudition. But on the the way home, Rav Soloveitchik said that there was one thing with which he did not agreee. When he offered the Rebbe a l’chaim (a toast), the Rebbe said, “Now the descendants of R. Chaim Volozhiner and the family of the Baal HaTanya have come together.” Rav Soloveitch said that this was not true. They had come together earlier, when Hitler had put the Chassid and the misnaged (the opponent of Chassidism) together in the same oven. That was when we realized that there is no difference between one Jew and another.
It should not take someone who hates and persecutes the Jewish people to remind us that there is no difference between Jews on the level of the soul. We must appreciate that the sould of every Jew is inseparable from the Congregation of Israel.
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