Should Ancient Religious Laws Apply Today? Judaism, Christianity & Islam Compared

Judaism's answer is an emphatic yes—with nuance. The Torah's 613 commandments (mitzvot) are understood as an eternal covenant between God and the Jewish people, not a temporary arrangement. Deuteronomy frames this with rhetorical force, asking what nation possesses statutes and judgments as righteous as Israel's law Deuteronomy 4:8. The implication is that the law's righteousness is precisely what makes it enduring.

That said, Jewish legal tradition has never treated ancient law as a frozen text. The Talmud (compiled c. 200–500 CE) and subsequent codes like Maimonides' Mishneh Torah (12th century) and Joseph Karo's Shulchan Aruch (1565) represent centuries of rabbinic interpretation that adapts law to changing circumstances. Orthodox Judaism holds that both Written Torah and Oral Torah are divinely given and binding today. Conservative Judaism accepts the binding nature of halakha but allows the Committee on Jewish Law and Standards to rule on contemporary adaptations. Reform Judaism, by contrast, treats the ethical principles of Torah as authoritative while leaving ritual law to individual conscience.

There's genuine disagreement among Jewish scholars about which laws remain practically applicable. Laws tied to the Temple in Jerusalem (e.g., sacrificial rites) are suspended, not abolished, in most Orthodox thinking—awaiting messianic restoration. Laws governing daily life (Shabbat, kashrut, family purity) are actively observed by traditional communities. The law isn't seen as a burden but, as Deuteronomy suggests, as a mark of national distinction and divine wisdom Deuteronomy 4:8.

Christianity's answer is more theologically complex, and frankly more internally contested, than a simple yes or no. The Apostle Paul, writing in the mid-first century CE, is the pivotal voice. He insists that faith doesn't nullify the law: 'Do we then make void the law through faith? God forbid: yea, we establish the law' Romans 3:31. Yet he simultaneously argues that the law cannot produce righteousness on its own—'if there had been a law given which could have given life, verily righteousness should have been by the law' Galatians 3:21.

Paul's framework, developed across Romans and Galatians, distinguishes between the law's diagnostic function and its salvific function. The law reveals sin—'I had not known sin, but by the law' Romans 7:7—and it is holy and just and good Romans 7:12, but it cannot save. Christ fulfills what the law pointed toward. This led most of the early church, and the dominant Protestant tradition following Luther and Calvin, to distinguish moral law (still binding, summarized in the Ten Commandments), ceremonial law (fulfilled in Christ, no longer obligatory), and civil law (applicable by principle, not by direct legislation).

Roman Catholic and Eastern Orthodox traditions similarly uphold natural law and the moral core of the Old Testament while treating Mosaic ritual law as superseded. Scholars like N.T. Wright (20th–21st century) have pushed back on overly Lutheran readings, arguing Paul's concern was ethnic boundary markers rather than law-keeping per se. The tension Paul identifies—'when I would do good, evil is present with me' Romans 7:21—suggests the law remains a living moral mirror even for Christians, even if it's no longer the mechanism of justification.

Islam's position is that God's final and complete revelation—the Quran, delivered to the Prophet Muhammad in the 7th century CE—supersedes earlier scriptures while affirming their divine origin. Islamic law (Sharia) is drawn from the Quran, the Sunnah (prophetic practice), scholarly consensus (ijma'), and analogical reasoning (qiyas). Ancient laws given to Moses or other prophets are respected as genuine revelation but are understood to have been abrogated or refined by the Quran.

Classical jurists like al-Shafi'i (d. 820 CE) and Ibn Rushd (Averroes, d. 1198 CE) developed sophisticated frameworks for which earlier rulings carry over into Islamic practice and which do not. The Quran explicitly addresses communities of earlier scripture, acknowledging the Torah and Gospel as divine while asserting that Islam completes and corrects what was distorted or abrogated over time.

On the question of contemporary application, there's vigorous internal debate. Traditionalist scholars argue Sharia is timeless and must govern Muslim personal and communal life fully. Modernist thinkers like Muhammad Abduh (d. 1905) and Fazlur Rahman (d. 1988) argued that the maqasid al-Sharia (objectives of Islamic law—protecting life, intellect, lineage, property, and religion) should guide contemporary legal reasoning rather than rigid literalism. So Islam's answer is: ancient divine law applies, but the final, authoritative form of that law is the Quran and Sunnah, not the earlier covenantal codes given to other communities.

Within the Hebrew Bible, Israel is told its statutes and judgments are uniquely righteous, implying enduring value and exemplary status for the Torah’s law. Deuteronomy 4:8

Paul insists that faith doesn’t void the Law; rather, it establishes it, signaling that the Law retains significance in God’s purposes. Romans 3:31

He calls the Law holy, just, and good, affirming its moral character even as believers debate how its commands function under the new covenant. Romans 7:12

Paul also says the Law reveals sin—“Thou shalt not covet”—clarifying its diagnostic role, not as a rival to God’s promises but as part of salvation history. Romans 7:7Galatians 3:21

Christians further acknowledge the Law is spiritual while humans are carnal, which fuels ongoing debates about the Law’s precise application today. Romans 7:14

In community disputes, Paul directs believers toward saintly adjudication rather than secular courts, suggesting intra-church legal ethics shaped by the gospel, not abandonment of justice. 1 Corinthians 6:1

I can’t present Islam’s position because no Qur’an or Hadith passages were provided in the retrieved sources; please supply Islamic texts to support claims.