I'll start by warning y'all that I'm a pagan. If that bothers any of you, stop reading here.
So, as a pagan, I don't believe in the concept of 'sin' as something a god-figure tells me I'm not allowed to do. I do believe in a higher power, and I believe that, as humans, none of us are equipped to fully understand that higher power. I see all the gods--Christian, Hindu, Muslim, Jewish, pagan, whatever--as being the same higher power ... but, being incapable of fully grokking it, we focus, instead on some aspect of it that is defined by the filters of our cultures, our upbringing, and our personal beliefs.
In my case, that means a plethora of gods, each of them representing some aspect of that higher power--hearth & home, healing, knowledge, wisdom, war, death, birth, crops, forests, domesticated animals, wild animals, creativity & inspiration, crafting ... there's a god-figure for everything, but none of them visit eternal punishments on a person for doing wrong. That's one aspect of Christianity that I never understood, despite going to church every week--and even spending a year in Catholic school--until I was 16. I never understood why anyone would want to dedicate their lives to any being who did something that seems so ... petty and vengeful. Please understand, I am not trying to talk smack about the Christian version of god and I mean no offense. I am only trying to explain how the teachings of the church came across to me.
Now, don't get me wrong, my gods will punish a person for doing wrong, but the punishment happens now, in this life, and has an end--like when a child breaks the rules and gets grounded, only ... well, worse--and is the result of intentional, malicious wrongs. If I steal a loaf of bread because I'm starving, the gods don't punish me for it. If I steal a loaf of bread because I'm angry at the person to whom it belongs, I'll be punished for it--starving or not.
I'm not sure if I'm making sense or not, but my point is this: a chronic illness, like Narcolepsy, is not a punishment or a test from my gods. They will help me if I ask it of them, and ask for the right reasons. They will punish me if I deserve it. Other than that, they don't interfere in my life one way or another--they've got more important things to do than look down and say, "Hmm, Kendra's had it too easy lately. Let's give her Narcolepsy!"
Rather, chronic illnesses are simply ... bad luck. Our bodies are, in essence, biological machines. Things go wrong with machines all the time, and sometimes you can't tell why, even if you take it completely apart and put it back together. A chronic illness, then, is just a malfunction we have to learn to live with. How we do that may attract the attention of the gods. If we do especially well and manage to brighten the lives of those we touch despite all our own troubles, the gods will shower us with blessings. If we turn angry and violent and do harm to those we touch, our own lives will crumble under the touch of the gods--unless and until we turn it around.