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

In Jewish thought, moral authority flows from God downward — but it doesn't stop there. God is the ultimate arbiter of right and wrong, yet He established human institutions to apply that moral order in the world. The Torah creates a legal-ethical framework, and human courts (batei din) are charged with rendering verdicts within it. Exodus 18:16 captures this delegation of authority vividly: Moses explains that when disputes arise, "I decide between one party and another, and I make known the laws and teachings of God" Exodus 18:16 — the human judge acts, but the source of the law is divine.

The Talmudic tradition (codified by scholars like Maimonides in the 12th century and Joseph Karo in the 16th) developed elaborate legal reasoning precisely because Jewish ethics isn't merely intuitive — it requires study, argument, and communal discernment. Deuteronomy 25:1 presupposes this institutional structure: "When there is a dispute between two parties and they take it to court, and a decision is rendered declaring the one in the right and the other in the other in the wrong" Deuteronomy 25:1 — right and wrong are determined through a process, not just personal feeling.

That said, Judaism is deeply suspicious of human self-assessment. Proverbs 21:2 delivers a sharp corrective: "Every way of a man is right in his own eyes: but the LORD pondereth the hearts" Proverbs 21:2. People rationalize. They convince themselves their actions are justified. Only God truly weighs the inner life. Job 34:4 introduces an interesting tension — Elihu invites his companions to "decide for ourselves what is just; let us know among ourselves what is good" Job 34:4 — but most rabbinic commentators read this as a call to rigorous communal reasoning under divine guidance, not autonomous moral invention. Ecclesiastes 3:17 closes the loop: "God shall judge the righteous and the wicked" Ecclesiastes 3:17, reminding readers that even when human courts fail, divine judgment is final.

Christian theology locates moral authority squarely in God's nature and revealed will. God doesn't simply declare things right or wrong arbitrarily — in the classical tradition articulated by Thomas Aquinas (13th century), God is the Good, and moral law flows from His character. This means right and wrong aren't invented by human consensus or cultural preference; they're discovered by aligning with God's nature as revealed in scripture and, for many traditions, natural law.

Proverbs 21:2 is cited frequently in Christian preaching precisely because it exposes the root of moral confusion: "Every way of a man is right in his own eyes: but the LORD pondereth the hearts" Proverbs 21:2. The Reformers, especially John Calvin in the 16th century, used this verse to argue that human conscience is corrupted by sin and cannot be trusted as a standalone moral guide. Proverbs 17:15 reinforces this: "He that justifieth the wicked, and he that condemneth the just, even they both are abomination to the LORD" Proverbs 17:15 — a warning that human moral reversals (calling evil good, or good evil) are deeply offensive to God.

Christians generally hold that God's moral authority is mediated through scripture, the Holy Spirit, and — in Catholic and Orthodox traditions — the Church's teaching authority (Magisterium or Holy Tradition). There's genuine disagreement between traditions here: Protestants tend to emphasize sola scriptura (scripture alone), while Catholics argue that the Church has binding interpretive authority. But all agree that Ecclesiastes 3:17 stands as the final word: "God shall judge the righteous and the wicked" Ecclesiastes 3:17. Human courts and moral systems are provisional; divine judgment is ultimate.

Islam's answer is unambiguous: God alone (Allah) is the ultimate source of moral authority. The Arabic concept of hukm — divine sovereignty over judgment — means that right and wrong aren't negotiable human constructs. The Quran is the primary vehicle through which God communicates His moral will, supplemented by the Sunnah (prophetic practice) and, in classical Islamic jurisprudence, the legal reasoning of scholars like al-Shafi'i (8th–9th century) and Ibn Rushd (12th century).

What's distinctive in the Islamic framework is the Quran's teaching that God has inscribed moral awareness directly into the human soul. Surah 91:8 states: "And inspired it (with conscience of) what is wrong for it and (what is) right for it" Quran 91:8. This fitra — the innate moral disposition God built into human nature — means every person carries an internal witness to right and wrong. But this conscience is a guide, not the final authority; it can be corrupted by desire and environment, which is why divine revelation is necessary.

The Quran also emphasizes that moral choices carry personal consequences. Surah 45:15 states: "Whoso doeth right, it is for his soul, and whoso doeth wrong, it is against it. And afterward unto your Lord ye will be brought back" Quran 45:15. Surah 41:46 echoes this almost verbatim: "Whoso doeth right it is for his soul, and whoso doeth wrong it is against it. And thy Lord is not at all a tyrant to His slaves" Quran 41:46. The repetition is deliberate — Islamic scholars like Ibn Kathir noted this rhetorical emphasis underscores both personal moral accountability and God's perfect justice. God doesn't impose arbitrary standards; He is just, and His moral law is for humanity's own benefit.

Judaism answers: God ultimately decides, and He will judge the righteous and the wicked in due time Ecclesiastes 3:17. Human self-confidence isn’t sufficient because “every way of a man is right in his own eyes,” so divine assessment of the heart is decisive Proverbs 21:2. The Torah provides procedures so justice isn’t left to private opinion: disputes go to a court that declares one party right and the other wrong, and leaders teach God’s laws and rulings Deuteronomy 25:1Exodus 18:16. It’s an abomination to justify the wicked or condemn the just, underscoring that moral verdicts must align with God’s standards Proverbs 17:15. Some readers stress formal courts as the day‑to‑day arbiter Deuteronomy 25:1Exodus 18:16, while others emphasize God’s direct judgment as the final authority Ecclesiastes 3:17.

Christian teaching, drawing on Israel’s Scriptures, holds that God is the true judge of right and wrong, not shifting human perception Ecclesiastes 3:17Proverbs 21:2. Believers are warned that what seems right to them may not be right before God, because the Lord weighs the heart Proverbs 21:2. Christian communities also engage in discernment, echoing the wisdom of examining together what is just and good Job 34:4. While Christians recognize the value of adjudication in public life, ultimate moral verdicts belong to God’s judgment, not merely to human courts or personal conscience Ecclesiastes 3:17Deuteronomy 25:1.

In Islam, Allah is the determiner and judge of right and wrong, and every soul is finally brought back to Him for reckoning Quran 45:15. God has inspired the human soul with awareness of its wrong and its right, so moral knowledge isn’t arbitrary or hidden Quran 91:8. Still, personal choices matter: whoever does right benefits his own soul, and whoever does wrong harms it, and Allah isn’t a tyrant to His servants Quran 41:46. The result is both humility before divine judgment and sober personal accountability for one’s deeds Quran 45:15Quran 41:46.