12 All who have sinned without the law will also perish without the law, and all who have sinned under the law will be judged by the law. 13 For it is not the hearers of the law who are righteous before God, but the doers of the law who will be justified. 14 When Gentiles who have not the law do by nature what the law requires, they are a law to themselves, even though they do not have the law. 15 They show that what the law requires is written on their hearts, while their conscience also bears witness and their conflicting thoughts accuse or perhaps excuse them
Matthew Henry's Commentary on Romans 2:12-15
Commentary on Romans 2:1-16
(Read Romans 2:1-16)
The Jews thought themselves a holy people, entitled to their privileges by right, while they were unthankful, rebellious, and unrighteous. But all who act thus, of every nation, age, and description, must be reminded that the judgment of God will be according to their real character. The case is so plain, that we may appeal to the sinner's own thoughts. In every wilful sin, there is contempt of the goodness of God. And though the branches of man's disobedience are very various, all spring from the same root. But in true repentance, there must be hatred of former sinfulness, from a change wrought in the state of the mind, which disposes it to choose the good and to refuse the evil. It shows also a sense of inward wretchedness. Such is the great change wrought in repentance, it is conversion, and is needed by every human being. The ruin of sinners is their walking after a hard and impenitent heart. Their sinful doings are expressed by the strong words, "treasuring up wrath." In the description of the just man, notice the full demand of the law. It demands that the motives shall be pure, and rejects all actions from earthly ambition or ends. In the description of the unrighteous, contention is held forth as the principle of all evil. The human will is in a state of enmity against God. Even Gentiles, who had not the written law, had that within, which directed them what to do by the light of nature. Conscience is a witness, and first or last will bear witness. As they nature. Conscience is a witness, and first or last will bear witness. As they kept or broke these natural laws and dictates, their consciences either acquitted or condemned them. Nothing speaks more terror to sinners, and more comfort to saints, than that Christ shall be the Judge. Secret services shall be rewarded, secret sins shall be then punished, and brought to light.