Jerusalem Talmud Nedarim 8:1:1-2:2

Hook

Ever wondered why a vow made "today" might end at sundown, while a vow made "this week" includes the Sabbath? The nuance lies not just in the duration, but in how we perceive the boundaries of time itself.

Context

This passage from the Jerusalem Talmud, specifically Nedarim 8:1, grapples with the intricate nature of vows and their temporal scope. The concept of nedarim (vows) is central to Jewish law, impacting personal piety and communal practice. The Mishnah and its accompanying Gemara here delve into the practical application of these vows, particularly when they reference specific timeframes like "today," "this week," or "this year."

A crucial historical backdrop to understanding this passage is the development of Jewish legal thought in the Talmudic period. The Rabbis were constantly seeking to articulate and refine the application of Torah law to everyday life. This often involved interpreting biblical verses and extrapolating principles through logical reasoning and an understanding of common human experience. The Jerusalem Talmud, compiled in the land of Israel, and the Babylonian Talmud, compiled in Babylonia, often exhibit different approaches and emphases. In this case, the Yerushalmi's focus on the nuances of temporal markers in vows highlights a particular concern with linguistic precision and popular usage as guiding principles in legal interpretation. The very act of defining what constitutes "today" or "this week" reveals a deep engagement with how time is perceived and linguistically encoded, reflecting the intellectual currents of the time.

Text Snapshot

Here's a brief look at the core of the passage, focusing on the Mishnah's opening statements:

‘A qônām that I shall not taste wine today,’ he is forbidden only until nightfall. ‘This week’, he is forbidden the entire week; the Sabbath belongs to the past. ‘This month’, he is forbidden the entire month; the day of the New Moon belongs to the future. ‘This year’, he is forbidden the entire year; New Year’s Day belongs to the future. ‘This Sabbatical period’, he is forbidden the entire Sabbatical period; the Sabbatical year belongs to the past.

But if he said, one day, one week, one month, one year, he is forbidden from day.

— Jerusalem Talmud Nedarim 8:1:1-2 (https://www.sefaria.org/Jerusalem_Talmud_Nedarim_8%3A1%3A1-2%3A2)

Close Reading

This section is a goldmine for understanding how the Rabbis thought about time and its impact on legal commitments. Let's break down some key insights.

Insight 1: The Fluidity of Temporal Units

The Mishnah immediately presents a fascinating distinction: a vow of "today" ends at nightfall, but a vow of "this week" includes the Sabbath. This isn't about arbitrary rules; it's about how we commonly perceive these units of time.

• "Today" (היום): The footnote clarifies, "The Tanna will not include the night with the day." This implies that for the purpose of a vow like "today," the day is understood as the period of daylight. Once daylight ceases and night begins, the "today" has effectively ended. The Penei Moshe commentary elaborates: "Since he said 'today,' it implies only until that day is completed, meaning until nightfall" (Penei Moshe on Nedarim 8:1:1:1). This is a practical understanding of a 24-hour cycle, but the vow's scope is limited by the concept of "daytime."
• "This Week" (שבוע זה): The footnote states, "If he makes a vow not to drink wine this week, he is forbidden until after the coming Sabbath day since the Sabbath is the end of the week." Here, the perception shifts. The week is seen as a more complete unit, culminating in the Sabbath. The Penei Moshe adds: "If he was standing in the middle of the week and said, 'this Sabbath is forbidden for me in all the days of the week, and the Sabbath itself is included in the prohibition of the past week' " (Penei Moshe on Nedarim 8:1:1:2). This suggests that when one refers to "this week," they are encompassing the entire seven-day cycle, including its designated end point. The Sabbath, as the conclusion, is inherently part of the "week" being vowed against.
• "This Month" (חדש זה) and "This Year" (שנה זו): Similar logic applies. The vow extends to the end of the month or year, with the Rosh Chodesh (New Moon) or Rosh Hashanah (New Year) being considered part of the future period. The Penei Moshe explains: "If he was standing in the middle of the month and said, 'this month is forbidden for me until the completion of the month' " (Penei Moshe on Nedarim 8:1:1:3). And for the year: "If he stood in the middle of the year and said, 'this year is forbidden for me until the completion of the year, and he is permitted on New Year's Day, which is counted with the coming future year' " (Penei Moshe on Nedarim 8:1:1:5). This highlights a conception of these longer periods as having defined beginnings and ends, and the vow pertains to the entirety of the current cycle, not just the remaining portion of daylight or the immediate future.

This initial distinction between "today" and "this week" reveals a crucial principle: the interpretation of temporal vows is deeply intertwined with common parlance and the perceived structure of time units.

Insight 2: The Role of "Belongs to the Past" vs. "Belongs to the Future"

The Mishnah employs a fascinating linguistic device: "the Sabbath belongs to the past," "the day of the New Moon belongs to the future," "New Year’s Day belongs to the future," and "the Sabbatical year belongs to the past." This isn't just descriptive; it's prescriptive for understanding the vow's duration.

• "The Sabbath belongs to the past": When vowing against "this week," the Sabbath, as the end of the week, is considered already "past" in the sense that it's part of the week you are vowing against. You are prohibited from wine throughout the week, and the Sabbath is the final day of that prohibited week.
• "The day of the New Moon belongs to the future": When vowing against "this month," the Rosh Chodesh, which marks the beginning of the next month, is considered "in the future." Therefore, the prohibition ends before the Rosh Chodesh arrives, making that day permissible. The Penei Moshe clarifies this: "And the New Moon that follows. The New Moon is not included in the days of prohibition, but rather it is counted as belonging to the future, and is permitted. And even on the two days of New Moon, he is permitted on the first day, which is the thirtieth day of the previous month, because people call it Rosh Chodesh" (Penei Moshe on Nedarim 8:1:1:4). This is a critical point – the vow is for this month, and the next month's beginning is outside its scope.
• "New Year’s Day belongs to the future": Similar to Rosh Chodesh, the vow "this year" ends before the next year's Rosh Hashanah begins.
• "The Sabbatical year belongs to the past": This is a bit more complex. When vowing against "this Sabbatical period" (a seven-year cycle), the Sabbatical year itself is considered "in the past" relative to the end of the Sabbatical period. This means the vow extends through the Sabbatical year and ends at the conclusion of the seven-year cycle. The Penei Moshe notes: "If he stood in the middle of the Sabbatical period and said, 'this Sabbatical period is forbidden for me until the completion of the Sabbatical period, and the seventh year is included in the past Sabbatical period' " (Penei Moshe on Nedarim 8:1:1:6). This implies that the vow encompasses the entire seven-year span, including the designated Sabbatical year, and the prohibition continues until the end of that cycle.

This concept of "past" and "future" within temporal units is a sophisticated way of delineating the boundaries of the vow, preventing ambiguity.

Insight 3: The Distinction Between "Today" and "This Day"

The Gemara then pivots to address a potential ambiguity: "But if he said, one day, one week, one month, one year, he is forbidden from day." This is contrasted with the initial Mishnah. The commentary notes: "If he stood in the middle of the day and said, 'one day is forbidden for me until tomorrow at this hour' " (Penei Moshe on Nedarim 8:1:1:7).

The core of this distinction lies in the interpretation of "today" versus "one day," and by extension, "this week" versus "one week."

• "Today" / "This Week" / "This Month" / "This Year" / "This Sabbatical Period": These phrases, marked by the demonstrative pronoun "this" (zeh), are interpreted as referring to the current, ongoing period as commonly understood. Their boundaries are defined by the start and end points of those commonly perceived units.
• "One Day" / "One Week" / "One Month" / "One Year": These phrases, lacking the demonstrative, are interpreted more literally and precisely. They refer to a duration of exactly 24 hours for "one day," seven 24-hour periods for "one week," and so on, measured from the exact hour the vow was made. The Penei Moshe emphasizes this: "If he stood in the middle of the day and said, 'one day is forbidden for me until tomorrow at this hour,' and similarly if he stood in the middle of the month and said, 'one month is forbidden for me until this day of the coming month,' and so on for a year and a Sabbatical period" (Penei Moshe on Nedarim 8:1:1:7). This means a vow of "one day" doesn't necessarily end at nightfall; it ends 24 hours after the vow was uttered, irrespective of day or night.

This distinction reveals a fundamental interpretive principle in Jewish law: demonstrative terms often carry the weight of common understanding and perceived temporal boundaries, while numerical or indefinite terms are treated with greater precision, measuring exact durations.

Two Angles

The Jerusalem Talmud's discussion here is a sophisticated engagement with the principles of interpreting vows. Two classic interpretive lenses emerge, often debated in rabbinic literature: the principle of Kefiat HaBriyot (following common usage) and Kefiat HaMikra (following biblical usage).

Angle 1: Following Common Usage (Kefiat HaBriyot) - The View of Rabbi Joḥanan

Rabbi Joḥanan, a towering figure in the Jerusalem Talmud, often emphasized that in matters of vows, one should follow common usage (minhag ha'olam). This means that the language of a vow is understood according to how ordinary people use and understand those terms in everyday conversation.

In this passage, the Gemara challenges Rabbi Joḥanan's view based on the Mishnah's ruling for "today." The argument is presented: "Does this not disagree with Rebbi Joḥanan, since Rebbi Joḥanan said, in matters of vows one follows common usage?" (Jerusalem Talmud Nedarim 8:1:1:6).

The Gemara then explores this: "It is not usual that a man should say to another in the evening, 'I did not eat until evening.' Would he say, 'yesterday'?" (Jerusalem Talmud Nedarim 8:1:1:7). This thought experiment illustrates the point. If someone is speaking in the evening, they wouldn't typically refer to the daylight hours of that same day as "yesterday." This suggests that in common parlance, "today" is understood as the period of daylight, and once it's evening, that "today" is considered concluded. The Mishnah's ruling that "today" ends at nightfall aligns with this understanding of common usage. The Penei Moshe supports this, stating: "Since he said 'today,' it implies only until that day is completed, meaning until nightfall" (Penei Moshe on Nedarim 8:1:1:1).

The subsequent discussions about "this day" versus "yesterday" further reinforce this. If someone is speaking in the morning, they might refer to the previous night as "yesterday." This adherence to how people actually speak and understand time is the hallmark of Rabbi Joḥanan's approach. He seeks to ground legal interpretation in the lived reality of linguistic practice.

Angle 2: Following Biblical Usage (Kefiat HaMikra) - The Alternative Approach

The Gemara, however, presents an alternative perspective that seems to contrast with Rabbi Joḥanan's reliance on common usage. It asks: "But here, one follows the opinion that in matters of vows one follows biblical usage?" (Jerusalem Talmud Nedarim 8:1:1:10).

This perspective argues that the definition of time units in vows should align with their biblical definitions. The primary biblical definition of a day is found in the creation account in Genesis: "And there was evening and there was morning, day one" (Genesis 1:5). This biblical framework defines a day as starting with the evening and ending with the following evening.

If one were to strictly adhere to this biblical definition, a vow of "today" might theoretically extend until the evening of the following day, encompassing a full 24-hour cycle starting from the previous evening. The Mishnah's ruling that "today" ends at nightfall would then seem to contradict this biblical model.

The Gemara attempts to reconcile this by suggesting that the specific case of "today" might be an exception where common usage prevails, or that the Mishnah is operating under a different interpretive principle. Rabbi Jonah of Bostra offers a nuanced perspective: "It is the way of people to say to another, 'bear with me this day' (he asks him to work with him during daytime only). There is an acceptation of 'day' in the vernacular which refers to daytime only." (Jerusalem Talmud Nedarim 8:1:1:11). This suggests that even within the broader understanding of "day," there's a common usage that specifically refers to daylight hours, which the Mishnah is picking up on.

However, the underlying tension remains: when interpreting vows related to time, do we prioritize the fluid, evolving language of everyday speech, or the more fixed, foundational definitions found in the Torah? The Jerusalem Talmud, through its dialectical method, explores both possibilities, ultimately leaning towards an interpretation that often harmonizes common usage with biblical principles, but not without acknowledging the potential for conflict. This debate highlights the sophisticated hermeneutical tools the Rabbis employed to ensure clarity and fairness in applying their laws.

Practice Implication

This passage has a profound implication for how we approach commitments, both sacred and secular. The meticulous distinctions the Rabbis draw between "today" and "one day," or "this week" and "one week," underscore the importance of clarity in our language when making promises or vows.

For instance, if you tell a friend, "I'll help you with your project this week," does that mean until Friday, or does it extend to Sunday? If you say, "I'll call you today," and it's already late afternoon, does that obligation extend into the evening? This Talmudic discussion encourages us to be precise.

In practice, it means:

• When making a commitment: Be as specific as possible. Instead of "this week," consider specifying "by Friday evening" or "until Sunday morning." Instead of "today," consider clarifying "before 5 PM today" or "until I go to sleep tonight."
• When interpreting a commitment: Try to understand the speaker's intent based on common usage, but also be aware of potential ambiguities. If a commitment is crucial, it's always better to seek clarification.

This isn't about being pedantic; it's about honoring the spirit and letter of our commitments, minimizing misunderstandings, and fostering trust. The Rabbis' concern with the precise temporal boundaries of vows reflects a deep understanding of human psychology and the potential for well-intentioned agreements to go awry due to linguistic imprecision. By internalizing this lesson, we can navigate our relationships and responsibilities with greater integrity and clarity.

Chevruta Mini

1. The Mishnah differentiates between "today" (ending at nightfall) and "one day" (lasting 24 hours from the moment of the vow). If you were making a vow today, which interpretation would feel more natural to you, and what are the potential consequences of each interpretation if it were misunderstood by the other party?
2. The Gemara grapples with whether to follow "common usage" or "biblical usage" when interpreting vows. If a commonly used phrase in modern Hebrew (e.g., "tomorrow") has a slightly different implication than its literal biblical counterpart, which principle should take precedence in determining the validity and scope of a vow made today?

Takeaway

The precise temporal boundaries of our commitments, whether vows or promises, are shaped not only by literal definitions but by our shared understanding of how time unfolds.