“For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness: All these evil things come from within, and defile the man.”
Mark 7:21-23 KJV
if we want to have a pure heart we have to seek the gospel and rid our hearts of thkngs like love of money , greed, self righteousness , pride , lustful intentions and fantasy, grudge bearing , judgement and condemnation of others ect
cigarette smoking has to do with the flesh it’s a terrible habit and destructive to the body there’s no doubt about that , but I don’t think it is about having an impure and demonically possessed heart
the gospel is about purifying our heart before God thkngs like greed unforgiveness pride , self exaltation , lust ect are the focus of the heart selfishness is our enemy and defiles the heart