Many, many years ago, one of my older brothers showed me a comic strip in which two characters were having a discussion. I forget the exact wording, but it was something to the effect of, "You know that great feeling you get when you clean your ears with a Q-tip? Well, since it feels so good, is it a sin?"
Okay, so that was poor delivery. I forget the witty wording, but the point that the cartoonist and my brother were both making was, "See? Isn't religion stupid?" My brother's reasoning was rightfully childish, but I don't know what the cartoonist's excuse was. Sin is subtle. Cleaning your ears is no more a sin than drinking alcohol, or watching football or chopping carrots. It is when something -- anything -- begins to dissolve your relationships, with God, with other people, with yourself, that you have a problem. Theoretically, given the right conditions, anything at all could infect your soul, but some activities tend to have a higher success rate of screwing with you than others.
Moses provided a practical Top Ten list, saying unto the people, "Check out these ten things. Don't do them. For real, just don't. They're all sins, and if you do them, you'll be sinning, and therefore you'll be a sinner. And sin is bad. So. Don't sin." But I don't really think that's the point. Those ten actions are, in themselves, to various degrees, destructive and unlawful. But on a deeper level, they are more means to a healthy lifestyle than they are an end in themselves. Don't kill people, because, on the one hand, that person will be dead, and that's bad. But perhaps just as bad, you yourself will be disfigured. Why? Because that's how you were built. You were built to not kill people. You were built to not lie and steal. Sure, you can handle it for a while, about as much as a Honda Civic can handle off-roading: fun for a while, then stuck in the mud.
This whole topic came up, strangely, while talking to my other brother, and my mom, about living a healthy lifestyle regarding diet and exercise. What a polluted industry. Meal plans, food groups, exercise machines, gym memberships, spinning classes, low-carb this, non-fat that, personal trainers, ipod armbands, computer shoes, antioxidants, omega-3, all meat, no meat, all raw, no bread, drugs, pills, vomiting, see results fast free easy easy easy.
Bullshit.
"People don't want to exercise. They don't want to eat healthy food. They don't want to stop drinking; they don't want to stop smoking; they don't want to stop having dangerous sex. They want to take a pill. Well, good luck."
-Richard Veech of the National Institute on Alcohol Abuse and Alcoholism
All of those things that I listed above are perfectly capable of contributing to a healthier lifestyle. The problem is that we view them as little pink pills that will fix everything. My personal litmus test for living: if something hasn't been around for 30,000 years, beware.