Mishneh Torah, Vows 4-6

Sugya Map: The Mechanics of Coerced Vows

• Core Issue: Does a vow extracted under duress (ones) or spoken in hyperbole (havai) retain binding force?
• Nafka Mina: Whether the Peh (mouth) and Lev (heart) must align for the vow to take effect.
• Primary Sources: Mishneh Torah, Hilchot Nedarim 4:1–3; Nedarim 27a; Shulchan Aruch, Yoreh De’ah 232.

Text Snapshot

"בכל נדרים אלו צריך שיהיה בלבו דבר המותר... שאין פיו ולבו שוין" (Hilchot Nedarim 4:3). (Translation: In all such vows, he must have an intent in his heart for something permitted... because his mouth and his heart are not in concord.)

Readings

• Radbaz: Argues that the heter of ones is rooted in the absence of gemirat da’at (final intent). Because the speaker is forced, the vow is a "performance" rather than a commitment.
• Mishneh LeMelech: Emphasizes that for havai (exaggeration), the speaker must maintain the "intent for something permitted" (e.g., "I won't eat this until the moon turns to cheese") to avoid the prohibition of Lo Yachel Dvaro (Numbers 30:3).

Friction

• Kushya: If the vow is coerced, why does the Rambam require the speaker to harbor a "permitted intent"? If it is truly ones, it should be null ab initio without requiring a mental reservation.
• Terutz: The Rambam implies a hierarchy of ones. True physical duress (death threat) may be void, but "social coercion" (tax collectors) creates a state where the vow exists but lacks the kavanah necessary for sanctity. The mental reservation serves as an internal "escape hatch" to prevent the speaker from stumbling into an inadvertent violation of an oath.

Intertext

• SA, Yoreh De’ah 232:14: Validates the Rambam, noting that if one is coerced, they may rely on mental reservation provided it doesn't lead to Chillul Hashem (public desecration) if the vow is broken.

Psak/Practice

The psak is clear: Nedarim are sensitive to kavanat ha-lev. While one should never take a vow they intend to break, in situations of genuine ones, the law prioritizes the preservation of the individual's autonomy over the literalism of the utterance.

Takeaway

Vows function on the intersection of speech and intent; where the Peh is forced, the Lev remains the final arbiter of obligation.