SDG here with some thoughts on conscience and authority sparked by the combox from my last post.
Every man is bound absolutely to follow his own conscience. Hopefully, if and when a man finds that his judgments of conscience are contradicted by competent authority, he will take that fact into account in informing and revising his judgments of conscience.
But this doesn’t mean blindly following competent authority. Sometimes, competent authority is wrong, and good men can honestly conclude that competent authority is wrong — sometimes when it is, sometimes when it isn’t.
So there is still the possibility of contradiction. What happens then is … tricky.
If a man’s conscience tells him that something is morally licit, and competent authority tells him otherwise, he will often be well advised to refrain from the activity in question in deference to competent authority.
If, on the other hand, a man’s conscience tells him that something is morally obligatory — or morally illicit — and competent authority tells him the opposite, he must not act against his conscience in deference to authority.
If he is in sufficient doubt as to the rightness of his own judgment, and is swayed by the weight of authority, then he may arrive at a new judgment of conscience, putting his faith in authority to guide him. Assuming he is honest in this process, the responsibility for his actions now lies to a significant degree with that authority. If authority has led him astray, there are millstones for such things. If it has led him aright, there are rewards.
Conversely, if he remains confident enough of his own judgments as to reject the guidance of authority, then he himself incurs a new burden of responsibility for his actions. In that case, he had better hope and pray that he is right. Just as following authority can mitigate one’s responsibility, flouting authority can aggravate it. That doesn’t mean you can never, or should never, do it. It does mean you take your head in your hands.
If one is instructed by one’s bishop not to present oneself for communion, there is an obligation to honor that instruction, even if one is privately convinced that the bishop’s instruction is unjustified. If the bishop is right, he has saved a sheep from (hopefully unwitting) sacrilege. If he’s wrong, a soul has suffered unecessarily, but with merit before God for sumbitting humbly to authority and meekly accepting unjust punishment.
However, even in such a case I don’t think the obligation is necessarily absolute. Take the case of a couple — a pair of converts, let’s say — whose marriage is not recognized by the Church because of a previous union for which the tribunal could not find evidence of nullity. And let’s say the couple has appealed to Rome, attempted every recourse, all to no avail.
And now let’s say that the couple knows, with great moral certitude, that even though they weren’t able to prove it to the tribunal, the previous marriage was not valid, and so their current marriage is valid. In such a case, it seems to me, they are not morally obliged either to refrain from conjugal union or to refrain from receiving communion.
If they can do so without scandal — if, say, they attend a parish where the circumstances of their marriage are not known and no one has reason to suspect that their marriage isn’t recognized by the Church — then I think it is possible for them to continue to live together as man and wife and to receive communion with a clear conscience.
Now, if the tribunal was right and the couple are wrong, their moral culpability is all the greater. When you rely on the internal forum, you accept a greater weight of judgment, just as you do when you presume to instruct or lead another.
Conversely, if a tribunal judges wrongly, and gives a couple a clean bill of marital health when in fact there is no marriage because of an existing impediment, if the couple acts in good faith in following the tribunal, the moral responsibility is the tribunal’s, not the couple’s. (It’s also worth noting that there is an obligation to try to work things out through the external forum, not just settle for the internal forum from the get-go. One might possibly choose, with fear and trembling, to disregard the wrongful verdict of a marriage tribunal, but this doesn’t mean that you don’t have to bother petitioning for a decree of nullity in the first place.)