Despite the title I'm not a Judas Priest fan, and I don't think they belong in the Rock HOF, but the title was too good to ignore.
I'm going to start with this premise. The terms rule, law, and command(ment) are functionally identical, and can be uses interchangeably for the most part. The second premise I'm going to start with is that sin is (at least in part) the breaking of the rules THWH has given us to follow.
So, on a very basic level breaking a rule, is us concluding that our judgement is superior to the entity that promulgated the rule. Even in the case of breaking a rule for a "good reason", we're essentially saying that the entity that promulgated the rule wasn't really intending that the rule be followed in this particular circumstance.
So let's look at the rules that YHWH gave us to follow. I'm going to focus on the top two only for this post. Mainly because Jesus Himself was very clear that these two rules are the foundation for every other rule YHWH promulgated. Those rules can be summarized as follows.
Love YHWH with all of your being, and love your neighbor the same way you love yourself.
Let's look at the first one first.
It seems safe to say that no one in the history of the world, except Jesus, has succeeded in loving YHWH with the totality of their being, every minute of their life. If there is someone else who's done this, I'd like to meet them. I think it's interesting that Mother Theresa (someone who many would offer as an example), was pretty adamant that she'd failed to adequately love YHWH or others. So, can we agree that any discussion of sin and it's seriousness starts from the place where we've all failed to follow the first and greatest commandment? Can we agree that failing to follow this commandment is a sin against YHWH?
I'm going to use Dan''s cookie example, because it points something out that subverts the point Dan thought he was making.
In Dan's example, some guy eats the last cookie, even though he knows that his wife really wanted to eat the last cookie.
The conclusion that Dan draws is that while the guy might be a bit of a cad, he's (at worst) committed a "minor" or "trivial" sin, which isn't big deal in the grand scheme of things. It's not like he raped anyone, right?
But, hasn't this guy really broken the second greatest commandment, and chosen to love himself more than his wife? Going a little deeper, didn't Paul (as a seeming extension of rule #2) command husbands to love their wives as He loved the Church? Which would, minimally, consist of sacrificing the husbands desires on the alter of elevating the wife's desires?
But, in all seriousness, is violating the second greatest commandment, to love others the way we love ourselves, really "trivial"? It's not a stretch to say that literally every single negative thing that plagues our world (war, murder, rape, slavery, theft, fraud, lying, etc) would not be a problem is we simply loved others as we love ourselves.
Let's go a level deeper in this. What the cookie eater is essentially communicating by his actions is that he doesn't have to follow rule #2. More than that he's communicating that he's really not that interested in following rule #1 either. How do we get here you ask? It's simple. Jesus said, "If you love me, you will keep My commandments.". One one level, as the second person of the Godhead, YWHW's rules are literally Jesus' rules. On another level, when Jesus confirmed that these rules were #'s 1&2, He was making those rules His as well. Which leaves us with this guy who's self contentedness has led him to conclude that he doesn't need to follow rule #1 or rule #2.
All of a sudden, it's starting to seem like calling his sin "trivial" or "minor" might be understating things a bit.
So, what is the common denominator to violating rules in virtually every situation? It seems like it is the human tendency to focus on one's self, and what's best for one's self at any given moment. It's the tendency for humans to conclude that this rule doesn't really apply to me, because I really need to break if for a really good reason. It's our focus on our selves.
But don't worry, focusing on and grounding our behavioral standards on ourselves, is "trivial". Why, because we do not need the Bible to tell us what the right thing to do is.