Who Decides What Is Right and Wrong? A Comparative Look at Judaism, Christianity, and Islam

In Jewish thought, the question of moral authority is answered clearly and early: God decides what is right and wrong. The Torah is understood not merely as a legal code but as a divine blueprint for ethical living, revealed to Moses at Sinai. Human beings have a persistent tendency to rationalize their own behavior, which is why the tradition insists that divine judgment supersedes personal conviction.

Proverbs captures this tension sharply: "Every way of a man is right in his own eyes: but the LORD pondereth the hearts" Proverbs 21:2. The Hebrew word pondereth (תָּכֵן, token) implies a precise weighing—God's assessment is not approximate but exact, penetrating motives that humans themselves may not fully understand.

Ecclesiastes reinforces this by affirming that divine judgment is inevitable and comprehensive: God will judge both the righteous and the wicked Ecclesiastes 3:17. This eschatological accountability is central to Jewish ethics—moral choices aren't merely social or cultural preferences; they carry weight before a divine Judge.

The rabbinical tradition, particularly as codified in the Talmud (compiled c. 200–500 CE), developed an elaborate system of halakha (Jewish law) precisely because subjective human moral reasoning was considered insufficient. Rabbi Joseph Karo's Shulchan Aruch (1563 CE) systematized these rulings for daily life, reflecting the conviction that God's standards, not human consensus, define the good.

Proverbs also warns that human judges who distort God's moral order—justifying the wicked or condemning the just—commit an abomination Proverbs 17:15. Even in the courtroom, the standard isn't human preference but divine righteousness. Deuteronomy instructs judges to align their verdicts with that divine standard: justify the righteous, condemn the wicked Deuteronomy 25:1.

There's genuine disagreement within Jewish thought, though. Liberal movements like Reform Judaism emphasize autonomy—the individual's reasoned engagement with tradition—while Orthodox Judaism insists on the binding authority of halakha as God's revealed will. Both, however, acknowledge God as the ultimate source of moral truth, even if they differ on how that truth is accessed.

Christianity's answer is unambiguous: God is the moral lawgiver, and human beings are morally accountable to Him. This conviction runs from the Old Testament wisdom literature through the New Testament epistles. The Christian tradition has never been comfortable with purely human-constructed ethics, precisely because Scripture repeatedly shows how easily human moral reasoning goes wrong.

Paul's letter to the Romans frames the question pointedly. When critics suggested that God's judgment was unfair, Paul responded with a rhetorical challenge: "God forbid: for then how shall God judge the world?" Romans 3:6. The implied answer is that God's role as moral judge is non-negotiable—if God isn't the standard, the very concept of judgment collapses.

Colossians adds an important democratic dimension to divine moral authority: "he that doeth wrong shall receive for the wrong which he hath done: and there is no respect of persons" Colossians 3:25. God's moral law applies equally to everyone—no social status, wealth, or religious pedigree exempts anyone from accountability. This was a radical claim in the hierarchical Roman world.

Christian theologians have debated the mechanism of moral knowledge across centuries. Thomas Aquinas (1225–1274 CE) argued for natural law—God's moral order is embedded in creation and accessible to reason. John Calvin (1509–1564 CE) emphasized Scripture's authority over unaided reason, since sin corrupts human moral perception. Both agreed, however, that God is the source; they disagreed on how clearly humans can read that source without divine revelation.

Contemporary Christian ethicists like N.T. Wright argue that moral intuitions point toward a transcendent moral order, but that Scripture and the Holy Spirit are necessary correctives to those intuitions. The tradition consistently warns—echoing Proverbs—that humans are prone to calling their own preferences "right" while God weighs the heart Proverbs 21:2.

Islam holds perhaps the most explicit position of the three traditions: moral authority belongs to Allah alone, a principle known as hakimiyyah (sovereignty). The Quran repeatedly frames moral commands as divine decrees, not social contracts or philosophical conclusions. Human reason (aql) is valued, but it's subordinate to divine revelation (wahy).

The Quran states directly in Surah Al-An'am (6:57): "The decision is only for Allah"—a verse that Islamic scholars like Ibn Kathir (1301–1373 CE) interpreted as encompassing both legal and moral authority. The Sunnah of the Prophet Muhammad (peace be upon him) provides the practical application of that divine moral framework.

Islamic jurisprudence (fiqh) developed four major schools—Hanafi, Maliki, Shafi'i, and Hanbali—each working to derive moral and legal rulings from the Quran and Hadith. The very existence of this elaborate scholarly tradition reflects the conviction that right and wrong aren't self-evident to human intuition; they require careful derivation from divine sources.

There's real internal debate within Islam, though. The Mu'tazilite school (8th–10th centuries CE) argued that human reason can independently discern moral truth, while the Ash'arite school (dominant in Sunni orthodoxy) countered that moral categories are defined by God's command—something is good because God commands it, not the other way around. Most contemporary Sunni scholarship leans Ash'arite.

The Quran's warning about human self-deception parallels the biblical passages closely. Surah Al-Qiyamah (75:2) references the nafs al-lawwama—the self-accusing soul—acknowledging that humans have a conscience, but one that requires divine guidance to function correctly. Without revelation, human moral reasoning drifts toward self-justification, a concern Islam shares with both Judaism and Christianity.

Judaism grounds moral authority in God as the ultimate judge: “God shall judge the righteous and the wicked,” which situates right and wrong within divine assessment rather than shifting human opinion Ecclesiastes 3:17. It also cautions that people readily rationalize themselves as right—“Every way of a man is right in his own eyes: but the LORD pondereth the hearts”—so subjective conscience is unreliable when it contradicts God’s scrutiny Proverbs 21:2. At the societal level, Torah authorizes human courts to administer justice—judges must “justify the righteous, and condemn the wicked”—placing communal discernment under God’s standards Deuteronomy 25:1. Perverting judgment (calling evil good or good evil) is condemned as “abomination to the LORD,” underscoring that legal decisions must reflect divine norms, not mere majority will Proverbs 17:15. Jewish interpreters have long debated how far judicial discretion extends, but the cited texts anchor final authority in God with responsible, accountable human judgment under Torah Ecclesiastes 3:17 Deuteronomy 25:1.

Christianity affirms continuity with the Hebrew Scriptures while explicitly stating that God will judge the world: “How shall God judge the world?”—a rhetorical insistence that divine judgment is certain and universal Romans 3:6. Moral wrongdoing is repaid without favoritism—“he that doeth wrong shall receive for the wrong… and there is no respect of persons”—so right and wrong aren’t defined by status, tribe, or power Colossians 3:25. Like Proverbs’ warning about self-justification, Christians read the Hebrew Bible’s wisdom as exposing the limits of private moral certainty before God who “pondereth the hearts” Proverbs 21:2. Some later Christian theologians have nuanced how grace, works, and judgment relate, but without further sources here I won’t attribute specific positions. The cited passages center divine judgment, personal accountability, and impartial justice as the decisive standards of right and wrong Romans 3:6 Colossians 3:25.

I can’t responsibly present an Islamic answer here because no Qur’an or Hadith texts were provided in the retrieved passages; supplying one would require uncited claims.