There is a sense and knowledge of sin left in the consciences of all men by nature. To tell them what is good and evil in many things, to approve and disapprove of what they do, in reference to a judgment to come, they need not go farther than themselves, Rom. 2:14, 15. But this is obscure, and relates mostly to greater sins, and is in sum that which the apostle gives us, Rom. 1:32, “They know the judgment of God, that they which do such things are worthy of death.” This he placeth among the common presumptions and notions that are received by mankind,—namely, that it is “righteous with God, that they who do such things are worthy of death.” And if that be true, which is commonly received, that no nation is so barbarous or rude, but it retaineth some sense of a Deity; then this also is true, that there is no nation but hath a sense of sin, and the displeasure of God for it.
– John Owen –
from Of Communion With God, volume 2 of Works, page 94