“who show the work of the law written in their hearts, their conscience also bearing witness, and between themselves their thoughts accusing or else excusing them)” (Romans 2:15).
As mentioned earlier, this reference to the “heart” is a translation of the word kardia in the original language of this passage. “Kardia” refers to our innermost being in a physical, emotional, intellectual, or spiritual sense. Here, in Romans 2:15, we observe the interplay between one’s heart and his or her conscience.
The “conscience” refers to “the soul as distinguishing between what is morally good and bad, prompting to do the former and shun the latter, commending one, condemning the other.” (1) Another source defines the conscience as. “that faculty of the mind, or inborn sense of right and wrong, by which we judge of the moral character of human conduct.” (2)
Much like an umpire, judge, or referee at a sporting event, the conscience serves as an arbiter of right and wrong. When those without access to God’s Word do what is right, the conscience judges accordingly and excuses their behavior. When they violate their consciences by engaging in inappropriate thoughts or behaviors, the conscience plays an accusatory role.
The human conscience thus enables us to assess our actions and motivations by functioning as an internal prosecutor or defense attorney. Today, when access to the Bible is widely available, our consciences should yield to the Biblical Scriptures in affirming or rejecting a particular thought, motive, or action.
For example, the Word of God should lead and inform our consciences based on the authority of Christ. Jesus validated His authority through His miracles (Mark 2:1-12) as well as His resurrection from the dead (John 20). Jesus affirmed the truth of the Biblical Scriptures (John 17:17) and accepted them as the Word of God (John 10:34-35) as well as the command of God (Matthew 15:3-4). He thus stands as the final authoritative source that should govern our consciences.
While our consciences serve as valuable guides when they are informed by God’s Word, they are not infallible. As Paul the Apostle said to the church at Corinth, “My conscience is clear, but that does not make me innocent. It is the Lord who judges me” (1 Corinthians 4:3 NIV), Therefore, as one translation paraphrases this section…
“When the Gentiles, who have no knowledge of the Law, act in accordance with it by the light of nature, they show that they have a law in themselves, for they demonstrate the effect of a law operating in their own hearts. Their own consciences endorse the existence of such a law, for there is something which condemns or commends their actions” (Phillips).
Image Attribution: Ludovic Péron, CC BY-SA 3.0, via Wikimedia Commons
(1) G4893 syneidesis https://www.blueletterbible.org/lexicon/g4893/kjv/tr/0-1/
(2) “Conscience.” Easton, M. G. Easton’s Bible Dictionary.

” Our moral inclinations are manifested in our reactions when others violate our rights; we don’t see the moral law nearly as clearly when we violate others’ rights… But again our sinfulness is not found in our inability to know what the moral duty is but in our unwillingness to do it to others.” (2)
First, we can say that no one (including those who do not possess the Old Testament Law) can deny the self-evident existence of “right” and “wrong.” A simple dialogue with someone who does not believe the concepts of “right” and “wrong” exist help demonstrate that reality…
However, that does not make someone innocent. Consider the preceding portion of that reference from Romans 5:13…
Let’s say person number one is a professional electrician who possesses a thorough understanding of electrical theory. Person number two does not know how electricity works. However, person number two has seen electrical appliances in use and is aware that something causes them to operate when they are plugged into an electrical outlet.
Another transcendent moral law states, it is wrong to be unjust. While injustice may take different forms, there is cross-cultural agreement on this general principle. In fact, we can find an ancient expression of this idea in the Biblical book of Proverbs: “The Lord detests the use of dishonest scales, but he delights in accurate weights” (Proverbs 11:1 NLT).
This approach argues for the existence of universal moral statutes that transcend time and culture. It also asserts that all laws have authors who create them. In order to prescribe those transcendent moral absolutes, our law source must also transcend time and culture as well. If we can document the existence of transcendent moral laws that every culture, tribe, and society recognizes and accepts, then it means that such laws must also derive from a transcendent source as well.
This approach builds on the cosmological argument for God’s existence in an important way. It states that the things that have been made serve to reveal the existence of a designer. Several analogies have been developed to illustrate this concept over the years. For example…
The field of archaeology offers another example. An archaeologist on a dig is not surprised to uncover a natural stone from an earlier era, for it is nothing more than a feature of the surrounding landscape. However, when that archaeologist uncovers a natural stone from an earlier era that has been fashioned into a tool, he or she knows that an intelligent entity modified that stone for a reason. The archaeologist thus finds a level of complexity in that discovery that natural processes cannot explain.
Romans 2:12 marks the first of seventy-eight appearances of the word “law” in the New King James Version of this epistle. An excerpt from the following commentary will serve as our introduction to this important concept…
Next, God’s judgment will be rooted in truth according to Romans 2:2. In other words, God will assess our thoughts and behaviors on the basis of reality and not appearance. While human beings are occasionally shocked to discover that others are not what they seem, God is never surprised by such revelations, and He will judge accordingly.
Another commentary likens God’s wrath to a large repository…
Paul then followed with a rhetorical question that assumes a negative response: “Do you really think God won’t punish you, when you behave exactly like the people you accuse?” (CEV). When faced with that uncomfortable reality, some may attempt to shift the blame for their shortcomings to someone or something else. While that approach may work with other human beings, it is wholly ineffective with the God who knows all.
The main point is this: the very act of creating this internal courtroom validates the practice of judging others. The problem comes when we fail to apply our personal judicial standards to our own thoughts, acts, and behaviors. It is often easy to exempt ourselves from the standards we apply to others, but in doing so, we establish two sets of rules: one for ourselves and one for others.