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A certain Sadducee said to R. Chanina "you people are impure as it states " “Her impurity was in her skirts” and the Divine Presence does not dwell upon the Jews when they are impure.
Rabbi Ḥanina replied to him: Come and see what is written about the Jewish people: “That dwells with them in the midst of their impurity” (Leviticus 16:16).
This indicates that even when they are impure, the Divine Presence dwells among them.
This idea of the divine indwelling even when we are impure leads us to an exploration of the notion of living in our humanity in the presence of the Divine and the demand for humility above all despite sin. And Reb Moshe of Coucy's dream.