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Scripture Topic Guide

Bible Verses About Natural Law

Early Christian writers often tied natural law to God’s law written into the human heart, so people can know basic moral truth even before hearing Scripture. Irenaeus, Clement of Alexandria, Origen, Archelaus, Methodius, and Lactantius all connect natural law with conscience, reason, and the inner law that calls people to good. They also say Christ did not cancel that moral law but fulfilled and deepened it.

The evidence is broad and strong on basic moral order, conscience, and reason, but thinner and mixed when authors move from moral law to specific rules about food, marriage, or other cases.

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Key Passages

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How to Study Natural Law

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Start with the clearest command or anchor text Read the primary passage in context before building doctrine from supporting references.
Trace the apostolic pattern Compare how the apostles preached, practiced, warned, and applied this topic in the churches.
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Scripture Map

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26 references

Supporting Passages

Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)

Primary Bible text for the law written in the heart

But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.

Parallel covenant text about law in inward parts

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:

Shows Gentiles doing the law by nature

For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:

Covenant text about laws written on the heart

This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them;

Hebrews parallel passage for inward law

The law of his God is in his heart; none of his steps shall slide.

law of God in the heart

Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart.

Heart-writing image used by early Christians

Ye are our epistle written in our hearts, known and read of all men:

Scripture passage attached to the early Christian evidence page.

Wherefore ye must needs be subject, not only for wrath, but also for conscience sake.

conscience and subjection

What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.

law exposes sin through conscience

Conscience, I say, not thine own, but of the other: for why is my liberty judged of another man's conscience?

Scripture passage attached to the early Christian evidence page.

For Moses describeth the righteousness which is of the law, That the man which doeth those things shall live by them.

Scripture passage attached to the early Christian evidence page.

Wherefore the law is holy, and the commandment holy, and just, and good.

Scripture passage attached to the early Christian evidence page.

(For until the law sin was in the world: but sin is not imputed when there is no law.

Scripture passage attached to the early Christian evidence page.

But we know that the law is good, if a man use it lawfully;

Scripture passage attached to the early Christian evidence page.

But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.

Key Bible text on the natural person and spiritual discernment

For our rejoicing is this, the testimony of our conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world, and more abundantly to you-ward.

Conscience language that fits the theme

For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:

Creation reveals God’s power and nature

And herein do I exercise myself, to have always a conscience void of offence toward God, and toward men.

conscience toward God and men

Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.

Scripture passage attached to the early Christian evidence page.

Holding faith, and a good conscience; which some having put away concerning faith have made shipwreck:

good conscience as moral standard

Howbeit there is not in every man that knowledge: for some with conscience of the idol unto this hour eat it as a thing offered unto an idol; and their conscience being weak is defiled.

Scripture passage attached to the early Christian evidence page.

For as many as have sinned without law shall also perish without law: and as many as have sinned in the law shall be judged by the law;

Scripture passage attached to the early Christian evidence page.

But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets;

Scripture passage attached to the early Christian evidence page.

Because the law worketh wrath: for where no law is, there is no transgression.

Scripture passage attached to the early Christian evidence page.

This is the law of the beasts, and of the fowl, and of every living creature that moveth in the waters, and of every creature that creepeth upon the earth:

Scripture passage attached to the early Christian evidence page.