PeteZa,
I agree with
baltobetsy and
rwoehmke and I disagree with **Markstorm **(welcome to the forums by the way!).
It is true that a mortal sin requires grave matter, sufficient knowledge, and full consent – however the first prong “grave matter” is not determined solely by the mechanics of the act.
The three sources of morality of human act (by which one would determine the moral goodness or badness of the act, along with its gravity) are: 1) the object of the act, 2) the intention of the actor, and 3) the circumstances.
In your example, doing something you
think is seriously wrong could rise to the level of “grave matter” in two ways: A) A mistake of fact which changes the moral object of the act.
Let’s say you are out at dinner with your family and friends and you excuse yourself to go outside for a breath of fresh air. While outside you see a car that captures your fancy and, after wrestling with your conscience, you decide to steal it. Only later you find out (thank goodness) that it was in fact YOUR new car that your father had bought you and was intending to give you at the conclusion of your birthday dinner. No legal ramifications here, but there a certainly moral ones. You did what you believed to be morally evil, although the mechanics of the act in themselves (taking your own car) are not.
B) A defect of intention.
Assuming that the action in itself is not gravely evil, it can rise to the level of grave evil if your intention for performing the (erroneously supposed evil) action is
because it is (erroneously believed to be) evil. So, if you (erroneously) believe that stealing a paper clip if contrary to a divine command and you do so in order to flout God’s supreme authority, you have committed a gravely evil act.
Hence the
Catholic Encyclopedia under Moral Theology sates:
Anyone have any thoughts, clarifications, or corrections to the way I laid this out? Comments appreciated!
VC