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Why do we treat safek berachos l'kula for birchas hamitzvah but l'chumrah for birchas hanehenin? The shiur analyzes the Tosafos (תוספות) position that birchas hanehenin stems from svar (rational obligation) rather than biblical derivation - we inherently must ask permission before benefiting from Hashem (ה׳)'s world. This creates an issur framework that explains stricter standards for food blessings versus mitzvah (מצוה) blessings.
This shiur provides a comprehensive analysis of Berachos 35a, focusing on the fundamental machloket between Tosafos (תוספות) and other Rishonim regarding the nature of our obligation to make blessings. The discussion begins with Rabbi Kivega's position that safek berachos l'kula doesn't apply to birchas hanehenin because eating without a bracha constitutes an issur - it's forbidden to eat without permission. This contrasts with birchas hamitzvah where safek berachos l'kula does apply. The Gemara (גמרא)'s opening question of 'mina hani milli' (from where do we derive this) becomes central to understanding whether blessings stem from svar (rational understanding) or require biblical derivation. Tosafos argues that svar alone can create obligations - we inherently understand that one must ask permission before benefiting from Hashem (ה׳)'s world. This svar is machayav (obligating) and doesn't require additional scriptural support.
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Berachos 35a
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