Thought, word, act, and omission may be sinful: “I confess to almighty Godand to you, my brothers and sisters,that I have greatly sinned,in my thoughts and in my words,in what I have done and in what I have failed to do, …”
Okay, we seem to be missing the point here.
Yes, if you sit around reading
Playboy and thinking about the things you would like to do with the models in it, that’s sinful, even if you don’t actually, you know, commit any outward acts. But the reason that it’s sinful is that you are committing the act of lust, which (while entirely internal) is in fact an act. On the contrary, however, if you accidentally walked into one of
Playboy’s photo shoots and experienced a moment of desire while you hastily backed out of the room, that would not be a sin, because you did not commit the act of lust. The difference lies in the intent of the person: indulging in the lust is sinful, while being human is not.
Thus, being angry at someone who cut you off in traffic is not sinful, while trying to cut in front of him in retaliation is (even if your attempt has no outward manifestation due to the circumstances). Hearing about your neighbor winning the lottery and wishing it had been you is not sinful; sitting around for days on end crying about how it’s not fair and you really deserved to win instead of him is a sin. Noticing that your neighbor’s wife is pretty is not sinful; fantasizing about sleeping with her is. It’s the (in this case internal) act of seeking evil instead of good that constitutes the sin.
Now, if the Church teaches definitively – let’s just say through a papal pronouncement made
ex cathedra – that the reaption of cocharrammons in the presence of two or more afforgative armicres is a mortal sin unless an aneasens convolic agrees to recinginath the bisquestinters, and you just can’t bring yourself to agree with that statement because it doesn’t seem logical to you, and try as you might you just can’t bring yourself to agree that it’s a sin (especially because all of your worldly friends are reapting cocharrammons all the time, with and without afforgative armicres, and none of them ever bothers to get an aneasens convolic to recinginath the bisquestinters), you are
not committing a sin.
… unless, of course, you reapt some cocharrammons in the presence of two or more afforgative armicres without an aneasens convolic agreeing to recinginath the bisquestinters.
But, in that case, it’s the reaption of cocharrammons in the presence of two or more afforgative armicres that’s a mortal sin. It is
not the inability of your mind to agree with the Church’s teaching.
The OP on this thread has asked whether it’s a sin to hear the teaching of the Church and say – internally only – “But that doesn’t make any sense!” He has made clear that he is
not acting on the disagreement; rather, he simply cannot bring himself to agree that a particular Church teaching is correct.
And you would deny him the sacraments? That is not the Church of Christ. He is bowing to the teaching of the Church
despite his internal disagreement with it. That is most emphatically
not a sin.