I'm having a lot of difficulty applying the scriptural references about 'eating' to 'smoking'. Mark 7 is talking about things ingested:
Mark 7: 17-19
17 After he had left the crowd and entered the house, his disciples asked him about this parable. 1
18 "Are you so dull?" he asked. "Don't you see that nothing that enters a man from the outside can make him 'unclean'?
19 For it doesn't go into his heart but into his stomach, and then out of his body." (In saying this, Jesus declared all foods "clean.")
Cigarette smoke is neither ingested, nor does it go into our stomachs, nor is it expelled as the scripture is talking about. The poisons stay in the body and directly hinder the functioning of the heart. And it is no secret, nor a mystery, that smoking is one of the leading cause of both heart disease and cancer. In fact, it's common knowledge that smoking leads to very serious health problems and ultimately death. In no way does smoking provide nourishment or sustanence for our bodies. It is not a food.
In my understanding more relevant scriptur is Exodus 20:13, "Thou shalt not kill". It is a willful, albeit cloaked in denial, rebellion against the sanctity of life. It is killing of the self, like a slow suicide. It shortens the life span and works against God's commandment, and desire, to preserve and promote life.
What about James 4:17?
17 Anyone, then, who knows the good he ought to do and doesn't do it, sins.
I don't think there are too many people who aren't aware of the seriousness of the harm that smoking does to people. It seems to me that smoking can appropriately be placed as a sin of ommission. And also as a sin of commission, because of the commandment to not kill.
Regarding other scriptual references that have been given:
Romans 14:22-23
22 So whatever you believe about these things keep between yourself and God. Blessed is the man who does not condemn himself by what he approves.
23 But the man who has doubts is condemned if he eats, because his eating is not from faith; and everything that does not come from faith is sin.
Again, this passage is talking about food choices and the Jewish holy days. My understanding is that Paul is talking about the dangers of judging one another, about accepting the choices some people were making to observe the Jewish ordinances. How does smoking fit into that?
And if this passage must be used, then what is faith, for "everything that does not come from faith is sin"? Does it mean believing that God wants us to suffer? Have you ever known or seen someone die of lung cancer? It is full of regrets. Have you tried to explain to their children and those who love them why they traded in time with them for cigarettes? Is that faith? That we can harm ourselves and others with our choices, believing that God doesn't have anything to say against it, or that the pain that it ultimately causes others doesn't somehow also hurt God?
faith (Strong`s 4102) - faith, faithfulness, belief, trust, with an implication that actions based on that trust will follow; `the faith`often refers to the Christian system of belief and lifestyle:-
I don't get the logic. And I don't see how the scripture you are providing for the purposes you are supporting does not cause a great conflict with the character and ultimate will of God. If you consider smoking to be a food, there is lots of conflict. If we take smoking out of the category 'food', then there is no conflict. It fits more rightly in the catagory of appetite or lust.
lust (Strong`s 1939) - desire, longing (in contexts where the the desire is positive and proper); coveting, craving, lusting (in contexts where desire is immoral and sinful):-
What smoker doesn`t crave another cigarette?
Look at Romans 13:14,
14 But put on the Lord Jesus Christ, and make no provision for the flesh, to fulfill its lusts.
and James 1:14-15
14But every man is tempted, when he is drawn away of his own lust, and enticed. 15Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
Smoking certainly brings about death, literally.
And also 2Peter 1:4
4Whereby are given unto us exceeding great and precious promises: that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust.
And also 1Corinthians 6:19-20,
19What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?
20For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's.
How is smoking glorifying God in our body? It seems to me that whomever chooses to smoke does not vallue their life as much as God values their life, and how can that choice then glorify God?
So how does smoking fit in with 1Corinthians 10:31?
31Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God. What is the glory of God? A puff of carcinogenic ingredients that take up the space of oxegyn in the lungs? A black heart? Lungs that can not get someone up a flight of stairs or allow a person to hike a ways up a mountain to see the splendor of His creation? Is it a person yoked to an oxegyn machine? Smoking starts out fine and dandy, people enjoy it, etc. but it doesn't end up there. It plays out more like James 1:15, as I've already mentioned: Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death. Smokers are killing themselves. And the people they smoke around.
Here are a couple references to food:
In Genesis 1: 28-29, God blessed Adam and Eve, giving them "every herb bearing seed, which is upon the face of all the earth, and every tree in the which is the fruit of a tree ueilding seed; to you it shall be meat." (29)
Have you seen the ingredients in cigarettes? Certainly, they do not fall as food in the above scripture.
In Genesis 9:3 God extends 'meat' to include "every moving thing that liveth shall be meat for you."
Still, no room for cigarettes here.
In Leviticus, when God divides foods into clean and unclean, He talks about living creatures. I do not see how smoking cigarettes can be considered food, or meat, or as something to 'eat'.
Addiction leads to imprisionment or death. This is know by everyone who has recovered and mastered an addiction. It is an eye-opening motivator driving people to the commitment to overcome their addiction. A sign of someone actively living an addiction is that they continure to take part in the behavior despite the knowledge of harm to the self and to others, despite the nagging of their conscience. They know it's not good for them. Even those who have NO faith know this. Us who have faith, know that God's plan is of good for us: Jeramiah 29:11 - "For I know the plans I have for you says the LORD, plans to help you, not to harm you, plans to give you a hope and a future." How does smoking fit in with the character, the will, and the love of God?
Certainly, God gives us the choice, and loves us regardless. We accept the savior and we are saved. But when we are saved we enter into sanctification, so we can grow and fulfill God's will. And it is clear, that God's will is good for us. It is life. It is love. It is everlasting life with Him. Smoking, as I see it, based on scripture, is a rebellion against God's character of love, His desire for good for us, and against His commandment to not kill, thereby ignoring the responsibility to preserve and support life.
As well as what I have mentioned earlier about denying ourselves the opportunity to let Jesus show us Hi strength and wisdom and be a living presence in our lives by asking, and letting Him release us from our bondages, in this case, it would be to the addiction to smoking.
It seems to me that smoking does hinder our walk with Christ.