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Why does Chazal read Yitzchok's blessing "tirosh" as both "rosh" (leadership) and "rash" (poverty)? The shiur explains that a berachah creates potential within a person—a new reality. If actualized, one becomes a leader; if not, the unfilled potential creates a vacuum that drives one to destructive behaviors. We are defined not by what we do, but by what we can be.
The shiur analyzes Yitzchok's blessing to Yaakov, "V'yiten lecha mital hashamayim u'mishmaney ha'aretz v'rov dagan v'tirosh" (Bereishis 27:28). Chazal note that the word for wine is written "t'rosh" (kesiv) but read "tirosh" (kri). They interpret this as: "Zachah na'aseh rosh, lo zachah na'aseh rash"—if he merits, he becomes a leader (rosh); if not, he becomes impoverished (rash). Rabbi Zweig asks: why does the formulation contrast becoming a leader with becoming poor, rather than simply saying "if he merits he becomes wealthy, if not he remains ordinary"? What is the deeper message in this blessing? Rabbi Zweig introduces a fundamental principle cited by the Kuzari: the greater something's potential for holiness, the greater its tumah (spiritual impurity) when that potential is absent. A dead Jew is metamei be'ohel (transmits impurity through enclosure), while a dead non-Jew is only metamei be'negiah (through touch). A neveilah (carcass) of a kosher bird is metamei only be'veis habelia (when swallowed), while a behemah (animal) is metamei be'heseit (even by moving it). The hierarchy of tumah corresponds to the hierarchy of potential: the greater the kedushah (holiness) something could have had, the greater the vacuum—and thus the tumah—when that kedushah is absent.
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Bereishis 27:28
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