The Idea of Halakhah

Woe to you, teachers of the law and Pharisees, you hypocrites! You give a tenth of your spices — mint, dill, and cumin. But you have neglected the more important matters of the law — justice, mercy, and faithfulness. You should have practiced the latter, without neglecting the former.

— MATTHEW 23:23

Savory, hyssop, and thyme: When they grow in the courtyard and are watched over, they are deemed food and are obligated in the tithe.

— MISHNAH MA'ASROT 3:9

The Descent into Law: from the Bible to the Mishnah

To make sense of the idea of law cultivated by the talmudic rabbis, we start by contrasting it to the view found in the Hebrew Bible.

Scripture places great emphasis on recognizing God as the creator of the universe, that God chose the Jewish people from among the nations, that God commanded them to live a life according to specific laws, and worship only the one God of the Torah. The Bible is particularly concerned with the political consequences of God's choice of the Jewish people, and its commandments focus on the nation and its institutions. Though it contains some legal minutiae, legal dialogue and analysis are conspicuously absent from the biblical verse. Instead, we see a few central themes repeated again and again: worshipping one God, avoiding idolatry, honoring Shabbat, preserving sexual morality, and taking care of the less fortunate. The Bible's religious consciousness — the categories it uses to understand God's message — center on national/political institutions such as the Temple, priesthood, prophecy, and the monarchy. In the Bible's ideal world, Jews live as a nation that follows the divine word.

The rabbis of the Talmud, too, held that God is the Creator and had chosen the Jewish people. For the rabbis, however, living God's will requires considerably more detailed knowledge of what the law mandates than a plain reading of the Bible lets on. To observe Shabbat one must know precisely when it begins, when it ends, and what "observing" entails. Similarly, refraining from idol worship requires a refined understanding of what acts constitute worship and which belief systems are deemed idolatrous. The talmudic sages held the laws of the Bible cannot be practiced until they are translated into more particular and detailed categories.

This, broadly speaking, is the project of the Mishnah, a code-like document compiled in the land of Israel in the second and third centuries C.E., which constitutes the foundation of rabbinic halakhah.

A critical difference between the worldviews of the Bible and the rabbis comes to light when examining the term "mitzvah." In the Bible, both the singular and plural forms of this term refer to the overall content of God's teachings and commandments. Throughout Deuteronomy, the people are implored "to follow the mitzvah which God has commanded" — that is, the whole of God's instructions. In the hands of the rabbis, however, the term gains a more concrete meaning: a mitzvah is a particular instance of halakhic-legal obligation. The rabbis held that the Torah is comprised of 613 individual mitzvot, each a foundational source of law. The Mishnah's goal is to articulate the scope of the mitzvot along with the rabbinic laws and enactments designed to expand and fortify them.

A second difference lies in the terminology used to talk about mitzvot. The Bible presents them within a series of grand theological and national narratives: the exodus from Egypt, the revelation at Sinai, the conquest of the land of Israel, and so forth. The Mishnah, however, analyzes the mitzvot in terms of their legal parameters. The Bible asks whether the Jewish nation is living in accordance with God's commandments. The Mishnah asks more specifically whether an individual is liable (hayav) or exempt (patur); whether certain foodstuffs are prohibited (assur) or permitted (mutar); and whether someone has discharged the obligation (yatzah) or failed to discharge it (lo yatzah).

Developing a Halakhic Consciousness

We can see the rabbis' halakhic consciousness at work in their analysis of the Torah's first mitzvah. The opening chapter in Genesis records, "God blessed [Adam and Eve] and said to them 'Be fruitful and multiply, fill the earth and subdue it.'" (1:28) On its face, this instruction does not explain what (if any) specific action is called for. Indeed, it has been reasonably interpreted as a poetic description of things to come, or a charge or blessing to humankind generally. The rabbis, however, understand it as a specific mitzvah that generates a legal duty incumbent every individual (male) Jew. To satisfy the legal requirement, the Mishnah rules that each male must sire at least two children. The Mishnah then presents a debate: in one view (held by students of the first-century mishnaic sage, Shammai), two male children are required; in the other (held by students of Shammai's frequent interlocutor, Hillel), the requirement is for one male and one female (m.Yevamot 6:6).

This snippet of Mishnah highlights two foundations of rabbinic law echoed in the narrative about the Academy of Heaven encountered in the introduction. First, it articulates specific directives: compare the Bible's "be fruitful and multiply" with the Mishnah's "have two children." Second, law is an object of analysis and debate. While the general framework (two children) is offered without any reservation, different views arise in considering the particulars. Finally, by preserving that debate, the Mishnah suggests that something is at stake here — the rule is worth debating.

Having assumed a legal framework, the Talmud — an elaborate commentary on the Mishnah compiled in the centuries following the Mishnah's dissemination — investigates numerous derivative questions. What happens if the children themselves cannot reproduce — do they "count" toward fulfilling the halakhic obligation? What if the children die — must the father have more? If the deceased children lived long enough to have had children of their own, do these grandchildren count in lieu of the deceased parents (b.Yevamot 63a)?

Following the Talmud's lead, later generations of rabbinic scholars pushed these issues even farther. What if the child is the product of an illicit relationship (e.g., incest or adultery)? What if...