The word "Sin" is used to describe undesirable actions of humans. But in my opinion it is a word invented by people to label certain actions that we don't desire during a time when we didn't know the cause of them. It is STILL meaningful today because we obviously still dont know enough about why random events happen , what causes these events by tracing them back to the source which actually is almost infinite. Random events and/or situations caused by indirect/direct influence or actions of others regardless if those actions /behaviors/events are desired or not. For example. Lets say a girl named "Anna" is crossing a busy highway and some guy runs her over and she dies either on the spot or at the hospital. Lets just say the guy did not intend to do this therefore it was an "accident". Usually anyone would not label this a "sin" because it was not intentional. Or was it? What if he was drunk? Even though the act of running over the girl wasn't intentional , he was still drunk therefore "irresponsible". Probably not considered a "sin". But lets say the guy driving was just driving around because he had a big fight at home with his wife. Therefore we can say if this "fight" never took place the man would probably have never left home in his car and therefore Anna would still be alive UNLESS another accidental event happened to Anna by some other driver or other situation not involving a car. But we can trace it down to Why did the fight take place in the first place? Was the wife cheating on him? Or Why was Anna crossing the busy highway to begin with? If Anna called off sick that day , we can safely say she would still be alive assuming the sickness wouldn't have killed her or some random murderer broke into her home. These are the things we have to think about. Some events or situation that may seem "random" can be caused by Nonrandom events etc. Sin comes in when we make wrong/bad/immoral decisions that we usually have control over. The world and universe is very complex and its up to us to make the best of it. Moral of the story? SHIT HAPPENS.