Yes, he incurs mortal sin. He only needs to know that it is a grave sin (which he does because he’s aware of the Church’s teaching, not believing it is something else), not to necessarily understand the why. Again, it’s assent that’s required. Just because he doesn’t fully understand the Church’s teaching does not excuse him from full knowledge. In fact, given the scenario you stated, the proper response would be to simply obey.Pathos…
Excellent responses. You have definitely cleared this up from the Catholic position…Except for one last scenario…
What about the Catholic who, on any particular topic, but let’s contraception…Studies the scriptures, studies the Catholic position, has always followed everything the Church has taught for his whole life, and comes to the honest and true belief that the Catholic Church is wrong. Again, it could be about anything. Unlike in the last example, this Catholic has always been engaged in the Church and has been devout. If he uses contraception, believing completely it is NOT a sin, but knowing the Catholic Church does think it is a mortal sin, will he receive the mark of a mortal sin on his soul according to the Catholic Church?
What I am trying to get at is…Does a sincere belief held by an informed Catholic (we have already examined this for Protestants and uninformed Catholics) allow the Catholic to escape mortal sin because he doesn’t have “full knowledge?” Or is “full knowledge” for the devout Catholic simply knowing the Church’s position, even if he doesn’t believe it?
I know we have sort of addressed this indirectly already, but just to be sure I get this straight, it would be great if you could address this last issue.
We can’t use the “sincere belief” excuse because of the obligation to properly form our consciences, and we don’t do that by following our own way (because teaching authority has been given to the Church, not to the individual). Too often “sincere belief” is merely self-deception.
There are many things we are all ignorant or unsure of, and the Church hasn’t ruled on and we can only proceed the best we can. However contraception isn’t one of them. Even the Church’s enemies know what the Church teaches about it. For a Catholic, merely knowing that the Church teaches it as a matter of morals binds the conscience. Faith seeking understanding, not the other way around.
So again, this hypothetical person is a devout Catholic. He will need to ask himself. Why do I remain part of the Catholic Church? If he answers because he believes it to be the Church founded by Christ, then he has to believe all that Christ said of it, with the power to bind and loose. If this is the Church founded by Christ, then he must believe the Church over himself in case of any conflict.