Romans 2:15

in that they show the work of the law written in their hearts, their conscience bearing witness therewith, and their thoughts one with another accusing or else excusing them) [The meaning here may be quickly grasped in the following paraphrase: Jews and Gentiles are alike sinners, yet each had a chance to attain legal justification; the former by keeping an outwardly revealed law, the latter by obeying an inwardly revealed one. Now, the Gentiles have such a law, as appears from their general moral conduct; for when those who do not have the law of Moses, do, by their own inward, natural promptings, the things prescribed by the law of Moses, they are a law unto themselves, having in themselves the threefold workings of law, in that the guidance of their heart predisposes them to know the right, the testimony of their conscience bears witness with their heart that the right is preferable, and lastly, after the deed is done, their thoughts or inward reasonings accuse or excuse them according as their act has been wrong or right. These well-known psychological phenomena, observable among the Gentiles, are proof conclusive that they are not without law, with its power and privilege of justification. Therefore, all are not sinners because there is respect of persons with God, for all have the possibility of attaining justification];