Smoking is a sin. Anything that hurts the body is self-mutilation. Philippians 3:2 says to watch out for those dogs, those evildoers, those mutilators of the flesh. I would take it as far as saying that you can also interpret where it says dogs as what Proverbs says about dogs, how they return their own vomit. To return to vomit is addiction. smoking is addictive because of the chemicals. chemicals are drugs when used to alter your mood. they call it getting high. cigarettes are drugs. hence, FDA... food and drug administration. the fda wouldn't have to have approved cigarettes if it was a class of drug. and it is certainly not food. i cannot believe to hear christians saying that smoking is not a sin. nicotene is the addictive chemical in cigarettes, it is also with e-cigs that nicotene is provided for.