Who show 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;)
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Ambrosiaster
AD 400
The meaning here is that those who believe under the guidance of nature do the work of the law not through the letter but through their conscience. For the work of the law is faith, which, although it is fully revealed in the Word of God, also shows itself to be a law for the natural judgment. Faith goes beyond what the law commands. Faith trusts in Christ. These people believe because of the inner witness of their conscience, because they know in their conscience that what they believe is right. It is not disjunctive for the creature to believe and worship his Creator, nor is it absurd for the servant to recognize his Lord. Unbelieving Gentiles will be judged first of all by other believing Gentiles, just as the Lord said that his disciples would judge the unbelieving Jews: “They themselves will be your judges.” The unbelief of the Jews will be judged by the faith of the apostles who, although Jews themselves, believed in Christ while the rest of their people rejected him. Similarly t...
Conscience and reason take the place of the law. By saying this, Paul showed that God made persons independent, giving them the freedom to choose virtue and avoid vice. Do not be surprised that he proves this point, not once or twice but several times. He had to do this in order to counter those who said: “Why did Christ delay his coming so long? Where was this great scheme of providence before Christ came?” … But even before the law was given the human race enjoyed the care of providence. Why does Paul insert the words accuse or perhaps excuse?If they have a written law and do what it says, how can their thoughts still accuse them? Paul is not speaking here of the righteous only but of all mankind. For then our thoughts do pass judgment, some excusing us and others accusing. And at that tribunal, one needs no other accuser.