Smoking is not categorically sinful — it depends on frequency, addiction, and bodily harm; 1 Corinthians 6 ('I will not be mastered by anything') is the relevant test.

Mike applies 1 Corinthians 6:12 — 'all things are lawful, but I will not be mastered by anything' — and considers a spectrum of cases: one cigarette annually (probably not sinful), one per day (ambiguous), a pack a day in full addiction (sinful, because addicted to a self-destructive substance), a pipe once a month without inhalation (probably not sinful). The test is whether the person is addicted, destroying their body, or violating their conscience (Romans 14).