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What distinguishes psik reisha lo nichah from melacha she'einah tzrichah legufa? The shiur develops a fundamental chakira: some melachot require only the physical action while others require specific intent to even constitute a melacha. This framework resolves the apparent contradiction between Tosafos (תוספות) and the Rambam (רמב"ם) on mafis morsah.
Rabbi Zweig explores a fundamental distinction in hilchot Shabbos (שבת) between two different categories of forbidden actions and their relationship to intent (kavanah). The shiur begins by examining the din of psik reisha lo nichah, identifying two distinct types of cases that fall under this category. The first type involves performing two actions simultaneously where one is mechaven for one action but not the other. According to Rashi (רש"י), to avoid psik reisha liability, one must actively not want the second action to occur. The second type involves a single action that has two possible implications or purposes (tachlisin) - if one focuses on one purpose and is lo ichpat lei (doesn't care) about the other, this also avoids psik reisha.
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Why does halacha forbid entering dangerous places if everything happens by Divine decree? The shiur examines the debate between Rashi and Tosfos on traveling at night, developing a fundamental distinction: Rashi holds one must avoid even deserved punishments that Hashem delays through mercy, while Tosfos holds the prohibition addresses self-inflicted harm through free will. This framework reveals how people rationalize self-destructive behavior as "hashgacha."
Why does the Gemara praise hospitality to scholars as a unique mitzvah rather than ordinary hachnasas orchim? The shiur distinguishes two mitzvahs: hachnasas orchim (providing for those in need) and connecting to talmidei chachamim (cleaving to God through scholars). Yisro's meal for the Jewish leaders wasn't charity—it was his way of bonding with those transformed by Torah, teaching that learning must fundamentally change who we are.
Kesubos 6a
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