But here’s something that confuses me: I’ve read (to my understanding) that if you do something that you
think is grave matter, even if it is not, then you commit grave sin – not because what you did was objectively grave, but because of the fact that you
thought it was grave and did it anyways. For example, if someone believes that tying their shoelaces is gravely sinful, and yet does it anyways, they have mortally sinned – not because tying their shoelaces is sinful, but because they thought it was and did it anyways.
Is this true? Or is my understanding false?
And see, this is what else causes that anxiety. Being scrupulous, I naturally believe that many things are grave matter when they actually aren’t. So it’s difficult to make moral decisions becasue of what I described above. I guess that’s why they tell the scrupulous to follow the “if you don’t know whether something’s sinful or not, do it anyways” rule, huh?
Thanks for the encouragement

It’s truly a blessing to see people helping one another – over the internet, none the less!!
No, no, no, you were right in the first place…if the matter does not turn out to be grave, there is not a mortal sin, and if the matter doesn’t turn out to be wrong, there probably is no sin at all.
Let us take the example of the shoelaces. It is objectively bad to leave them untied, because the ends of the shoelaces will get all mucked up, and besides you could trip. This is the way moral law works. God’s law is never arbitrary. Things are wrong because they lead to bad consequences.
OK, so you’re five. Let us say that you can’t remember if you’re always supposed to tie them or always supposed to leave them untied. You just don’t know, and on that account, you are one worried little girl. Well, worried little girl, let’s look at the possibilities, and then maybe you won’t worry so much.
Let us say you decide, “hmmm, I’m worried that I’m wrong, but I’m pretty sure that untied is the safe arrangement.” You leave them untied. That’s objectively the wrong decision, because you could fall. If you were to trip on them and fall, though, you wouldn’t be culpable. Your knees would be skinned up, but you wouldn’t get into trouble. You were doing your best. God will kiss your knees and make them better and then go over the rules about shoelaces again, until you get it right. He didn’t have you so He could give you rules! He gave you rules because He cares about you… and your knees!
Let us say, though, that you decide, “I don’t know which is right, and I don’t care, because I’m mad at Daddy and I hate these stupid shoes He chose for me, anyway.” Whether you tie them or not, and whether fall or not, you are being a naughty little girl! Your attitude is wrong. It would be the attitude, though, and not your choice that would be where the naughtiness is. You would be a rash little girl if you were to say to yourself, “Oh, Daddy, he’s always making rules, but he’s such a softie. He won’t be mad for long if I do the wrong thing, so what does it matter?” That attitude is not how little girls get to be smart capable big girls!
What is the best case? Well, you obviously can’t just magically try harder and simply know. Sometimes, you do your best to know the rules, and a situation will still come up that stumps you. In this case, you look at your shoes and you say, “I can’t remember which is which. I’ll ask one of the older kids Daddy would want me to ask” or “I don’t know what to do; I’ll just choose what seems the thing Daddy would want, and then later I’ll ask somebody, so that next time I’ll know.”
We are God’s children. He allows the consequences we choose, but He isn’t looking to punish us for bad decisions. He wants us to follow His will, so we accomplish what is good and as much as possible avoid the bad outcomes we can avoid. Among those accomplishments, He wants us to pursue a relationship with Him, which is where our “actions of attitude” come in. If we ever pull a “I don’t care”, what He wants for us is to stop and say, “Wait. I’m sorry. I know you’re good, I know you only will that which is the best, I know you love me, and I do love you back. I do care. Help me remember to care, even when I’m mad or don’t understand your rules. Help me to do my best and help me never be afraid of you.”
He does want that for us, so much so that it is the most oft-repeated command in the Bible: Be not afraid. Do your best, and then be not afraid. You’ll be all set.