Daily Talk

The Topology of the Forbidden

The Rambam now maps the boundaries of the vow -- what exactly is included when a person declares a category of things forbidden? In the fine distinctions between 'food' and 'sustenance,' between 'cooked' and 'roasted,' between permanent and temporary, he reveals that every vow creates a unique topology of prohibition whose borders must be carefully traced.

Nedarim 4-6Saturday, May 23, 2026

The Topology of the Forbidden

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About This Talk

Nedarim chapters 4 through 6 explore the scope, interpersonal dimensions, and temporal boundaries of vows. Chapter 4 examines how general terms in vows are interpreted -- when a person vows off 'food,' the Rambam defines precisely what falls within and without that category, following the principle that vows are interpreted according to common usage in the speaker's locale. Chapter 5 turns to interpersonal vows -- declarations that prohibit one person from deriving benefit from another -- and the complex rules governing what constitutes prohibited benefit and what workarounds are permissible. Chapter 6 addresses the temporal framework of vows: when they take effect, how long they last, the rules for conditional vows, and the distinction between vows with fixed durations and those that bind indefinitely.

The Topology of the Forbidden | The Rambam Experience