They show that the demands of the law are written in their hearts, while their conscience also bears witness and their conflicting thoughts accuse or even defend them
And the king said to Shimei: “In your heart you know very well the evil that you did to David my father. Now the Lord is bringing your own evil upon your head.
For when the Gentiles who do not have the law by nature observe the prescriptions of the law, they are a law for themselves even though they do not have the law.
Indeed, those who are physically uncircumcised but carry out the law will pass judgment on you, with your written law and circumcision, who break the law.
For our boast is this, the testimony of our conscience that we have conducted ourselves in the world, and especially toward you, with the simplicity and sincerity of God, [and] not by human wisdom but by the grace of God.
Therefore, since we know the fear of the Lord, we try to persuade others; but we are clearly apparent to God, and I hope we are also apparent to your consciousness.
To the clean all things are clean, but to those who are defiled and unbelieving nothing is clean; in fact, both their minds and their consciences are tainted.