In the combox for part 2, a reader writes:
But where might the concept of natural law come in — that is, the idea that certain moral laws are written on all people’s hearts, such that they cannot authentically claim that they didn’t recognize the wrongness of a certain action?
It would seem to me that such persons would have to actively “bury” the natural law in order to not recognize the wrongness of such actions — and it is that choice to “bury” the law that is sinful and extends sin to the actions that follow.
Natural law is assumed throughout my comments on conscience and authority. If there were no natural law, we would have no basis for arriving at judgments of right and wrong — we could only have blind intuitions, authoritative declarations or some combination of the two. Morality would seem totally random to us; we could have no insight into why something was right or wrong.
The possibility of “burying” or suppressing innate knowledge of right and wrong is of course always an ever-present factor to be contended with. To the extent that one is culpable for the false conclusions one arrives at, one has deliberately avoided reaching, or has at least sabotaged, one’s “last best” judgment about the right thing to do.
To that extent, one is culpable for misforming one’s conscience and therefore to that extent for the false judgments one arrives at — what is called “vincible” ignorance — and the sinful acts one commits in that state.
However, the disfiguring effects of original sin upon the faculties — what Catholic theology calls concupiscence — are also an important factor impeding us from coming to a knowledge of the truth, even the truth written on our hearts. Because of this, it can be difficult or even impossible for us to ascertain the extent to which our own acts of suppression, as opposed to the innate brokenness of our fallen condition, are responsible for our flawed knowledge of moral truth.
So, while it’s true that the moral law is written on our hearts so that we have knowledge of the truth, it’s also true that our intellects have been darkened by original sin, and this darkened condition is part of the concupiscent weakness that, even after original sin is washed away by baptism and we are reborn in Christ, makes it hard for us to attain, understand and retain spiritual truth in the fulness of its beauty and integrity.
This is why we need proper formation, as well as the illumination of regeneration, to help compensate for, correct and transcend the limitations of our broken ability to interpret correctly the truths written on our hearts. Ignorance of this sort, for which one is not culpable, is called “invicible” ignorance.
Thus, for example, we can’t necessarily say with confidence that a Protestant raised in a culture where acceptance of contraception is unanimous, or a Muslim raised with acceptance of polygamy, etc., is personally culpable for suppressing his conscience on these points — i.e., that his ignorance is vincible rather than invincible. Unanimous cultural consensus carries significant moral authority, and in the absence of adequate formation the truths written on our hearts may not come across with sufficient clarity to the darkened intellect to empower the individual to challenge his culture.
Or again they may, by God’s grace, for a particular person. But it’s for God alone to judge that in a particular case a person is necessarily culpable for burying the witness of his conscience. Even when it comes to more disturbing practices or institutions (female genital mutilation or male castration, for instance, or even human sacrifice), ascertaining the moral culpability of individuals is not for use to judge.
I’m not denying that individuals in such cultures, or some individuals, may know somewhere deep down that these things are wrong, and may be culpable for suppressing such knowledge of the truth as they may find written on their hearts. I’m saying that concupiscence complicates things, and only God can can ascertain the vincibility or invicibility of particular errors, the culpability or inculpability of a particular person’s failure to discern truths written on our hearts.