Romans 2:15 & Jer 31:33: God's law link?
How does Romans 2:15 connect with Jeremiah 31:33 about God's law?

Setting the verses side by side

Romans 2:15 — “since they show that the work of the Law is written on their hearts, their consciences also bearing witness, and their thoughts either accusing or defending them.”

Jeremiah 31:33 — “But this is the covenant I will make with the house of Israel after those days, declares the LORD. I will put My law within them and write it on their hearts. And I will be their God, and they will be My people.”


Law written on every heart from creation

• God engraved a moral code into all people, Jew and Gentile alike.

• The conscience is God’s built-in witness, echoing His standards even where Scripture has not yet been heard.

Genesis 1:27 shows humanity created in God’s image; Romans 1:19-20 adds that what may be known about God is evident within people.

• This inner testimony leaves no one truly “lawless”—it either accuses or excuses every thought, word, and deed.


Promise of an inner law through the new covenant

• Jeremiah anticipates more than a conscience; he foresees a supernatural heart-transplant.

Ezekiel 36:26-27 describes God giving a new heart and Spirit so His people “walk in My statutes.”

Hebrews 8:10 and 10:16 cite Jeremiah to confirm the promise is fulfilled in Christ, applied by the Spirit.

2 Corinthians 3:3 pictures believers as “a letter of Christ… written not on tablets of stone but on tablets of human hearts,” fulfilling Jeremiah’s vision.


One Author, one Law, two stages

1. Creation: the law “written on their hearts” universally (Romans 2:15).

2. New covenant: the law “written on their hearts” salvifically (Jeremiah 31:33).

• Stage 1 convicts; stage 2 converts.

• Stage 1 reveals guilt; stage 2 grants grace and power to obey.

• Both stages affirm the same moral law—holy, righteous, and good (Romans 7:12).


Implications for daily life

• Conscience matters—heed it, inform it with Scripture, and keep it clear (Acts 24:16).

• Salvation matters more—only the new covenant heart can love God’s law and do it (Psalm 40:8; Romans 8:3-4).

• Evangelism connects to both truths: every person already senses God’s standards, and every person needs the gospel that writes those standards in power.

How can we align our actions with the law 'written in their hearts'?
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