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What is the nature of a neder of hekdesh — is it a transfer of property rights to hekdesh, or a commitment to deliver something? The shiur analyzes the two interpretations in the Ramban (רמב"ן) and shows how the Rashba and Ran's debate over safek yad (uncertainty in vows) hinges on which understanding you adopt. The Rambam (רמב"ם)'s position that hefker is built on the foundation of nedarim — a commitment without an issur chefetz — emerges as a third model.
The shiur explores a fundamental machloket regarding the nature of nedarim, particularly nedarim of hekdesh (consecration). The Ramban (רמב"ן) offers two possible explanations for how a neder of hekdesh works. The first pshat is that a neder of hekdesh creates a shibud nechasim — an immediate lien or property interest that hekdesh acquires. According to this understanding, the neder itself is not primarily a commitment to keep one's word, but rather an actual transfer of property rights. The mechanism relies on the principle of amirat Yisrael k'mesirat hedyot — that by hekdesh, verbal commitment creates an actual transfer, unlike transactions between ordinary people which require a kinyan. The second pshat in the Ramban is that a neder of hekdesh is fundamentally a commitment — a promise to deliver something to hekdesh in the future. The shiur notes that this is closer to the conventional understanding of nedarim as obligations to fulfill one's word. The difference between these two approaches affects how we understand the issur of bal te'acher (delay in fulfilling vows). According to the first pshat, bal te'acher is a separate obligation that arises after the property transfer has already occurred. According to the second pshat, bal te'acher might be intrinsic to the neder itself, defining the time parameters of the commitment.
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Nedarim 7a
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Why does the Gemara present a kal v'chomer for chuppah making kiddushin based on kesef not being maichel b'terumah, only to reject it? The shiur reveals that even the rejected kal v'chomer establishes a fundamental yesod: kiddushin is a kinyan for ishus (marital relationship), not merely a kinyan in hilchos kinyanim. The second kal v'chomer—from chuppah being gomeres—raises Tosafos's famous question.
Is the kesef used in kiddushin a true kinyan (acquisition), or merely a symbolic means of establishing marriage? The shiur analyzes multiple interpretations of the Gemara's derivation from ki yikach ki'ach mi'Sayeffron, exploring whether marriage constitutes ownership, and develops three fundamental approaches: (1) The Gemara proves ishus is a kinyan, (2) ishus is not a kinyan but uses kinyan-like means, or (3) ishus is a kinyan but the kesef may not be a ma'aseh kinyan. The Rambam's position—calling kesef "midivrei sofrim"—is explained as distinguishing between cross-referencing concepts versus borrowing terminology.
Why does the Mishna alternate between the language of "kinyan" (acquisition) and "kiddushin" (sanctification) when describing marriage? The shiur develops a fundamental distinction: marriage has two separate aspects—a kinyan dimension (ownership) and a kedusha dimension (sanctified relationship). Either aspect can initiate the bond, and understanding this dual nature resolves multiple textual and halachic questions throughout the sugya.
Does kiddushei shetar require a shevah pruta? The Ran presents two approaches to the Rif's position. The shiur develops the Ran's second pshat that shetar kiddushin functions as a hachnah (exchange) rather than a mere kinyan nesina. This reading has profound implications for isuri hana'ah, mechubar, and the relationship between kesef and shetar.
