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Why don't tzitzis, mezuzah, and tefillin override Shabbos (שבת) if they're obligatory every moment? The shiur develops a chakira between 'chovas gavra' (personal obligation) and 'chovas chefetz' (object obligation) in these mitzvos. While the garment-preparation aspect could theoretically be delayed, the person's continuous need for tzitzis when wearing a four-cornered garment cannot be 'made up' - resolving Tosafot's difficulty on Shabbos 131a.
This shiur provides a comprehensive examination of Shabbos (שבת) 131a, focusing on the fundamental principle of 'ein kavul lazman' (not fixed to a specific time) and its application to mitzvos that potentially override Shabbos. The Gemara (גמרא) presents a debate between Rabbi Yosef, who argues that mitzvos like tzitzis, mezuzah, and tefillin do not override Shabbos because they are 'ein kavul lazman' - meaning they can be performed at any time - and Abaya, who counters with 'kol sha'ah v'sha'ah' - that these are obligations every single moment. Rabbi Zweig explores multiple interpretations of what 'ein kavul lazman' means practically. One understanding is that these are mitzvos one never absolutely must do (like buying a house to be obligated in mezuzah), versus mitzvos with mandatory times (like sukkah on the first night). Another interpretation focuses on whether the mitzvah (מצוה) can be 'made up' if missed.
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Shabbos 131a
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