📖 Biblical Definition
The Argument from Conscience holds that the universal moral conscience — the felt sense of this is right; that is wrong — cannot be adequately explained by social construction or evolutionary advantage alone. The conscience's authoritative weight, its persistence across cultures, and its apparently transcendent character imply a moral Lawgiver. Romans 2:14-15 grounds the argument: the Gentiles, which have not the law, do by nature the things contained in the law... their conscience also bearing witness.
📜 Webster 1828 Definition
(Theistic argument.) Universal moral conscience implies a moral Lawgiver beyond social construction.
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Romans 2:14-15 is the classical Pauline formulation: the law is written on the heart; the conscience is its witness. The argument was developed by Cardinal Newman (Apologia Pro Vita Sua, 1864) and C. S. Lewis (Mere Christianity, 1952).
Lewis's Mere Christianity opens with the argument: people invoke right and wrong in disputes (that's not fair) implying a real standard. The standard is not invented; it is discovered. The standard's real authority points to a real Authority.
📖 Key Scripture
Romans 2:14 — "For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves."
Romans 2:15 — "Which shew the work of the law written in their hearts, their conscience also bearing witness."
1 Timothy 1:5 — "Now the end of the commandment is charity out of a pure heart, and of a good conscience, and of faith unfeigned."
Hebrews 10:22 — "Having our hearts sprinkled from an evil conscience."
⚠️ Modern Corruption
Modern secular ethics often grounds morality in social construction or evolution; the persistent authority of conscience across cultures is hard to explain on either basis alone.
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The conscience's authority is what makes it interesting. I should not have done that is not a description; it is a verdict. Where does the authority to verdict come from, if there is no Lawgiver?
The household's ethical formation rests on this. Children are not taught morality only; they are awakened to a moral standard already present in them. The catechism gives shape; the conscience supplies the resonance.
🔗 Greek & Hebrew Roots
Latin conscientia; com (with) plus scientia (knowledge).
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Latin conscientia — literally knowing-with; co-knowledge of one's acts.
Note: Newman called conscience the aboriginal Vicar of Christ.
Usage
"That's not fair implies a real standard."
"The standard is not invented; it is discovered."
"Children are awakened to a moral standard already present in them."