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Why does the Mishna say "isha niknes" — that a woman is acquired? The shiur analyzes Tosafos (תוספות)'s reading that without the gezeira shava of "kicha" from Efron's field, kesef might not create a kinyan at all. The key insight: "kach mimeni" indicates a bilateral act, not just unilateral giving, which transforms monetary transfer into kinyan.
This shiur on the opening lines of Masechta Kiddushin explores the Gemara (גמרא)'s proof that kesef creates a kinyan in marriage. The Gemara asks why the Mishna uses the term "isha niknes" — suggesting acquisition — when a different Mishna uses "ha'ish mekadesh" — implying the man's action. The Gemara answers with a gezeira shava: we learn "kicha" by marriage from "kicha" by Efron's field, establishing that kesef creates kinyan. Rabbi Zweig presents Tosafos (תוספות)'s fundamental insight: the gezeira shava is not merely teaching that kesef is used, but that kesef creates kinyan. Without learning from Efron's field, we might know that marriage involves giving money (from "yotzei chinam ein kesef" regarding an ama ivriya), but we wouldn't know it's a kinyan. Kesef alone doesn't prove kinyan — it could be merely a ritual or requirement without creating acquisition.
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Kiddushin 2a
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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.
