Jesus set an example for us even him who did not commit any sins sanctify himself,
And for their sakes I sanctify myself, that they also might be sanctified through the truth. John 17:9
For I have given you an example, that you also should do just as I have done to you John 13:5
‘God, I thank you that I am not like other people—robbers, evildoers, adulterers—or even like this smoker...
. I believe God is honored by the struggle, even if victory seems far away. I am far less concerned about whether the act of inhaling smoke is a sin than I am about the hold the addiction has on one's life. Keep up the good fight, but don't feel under condemnation because the battle is long and hard.