But I know many smokers who are good men and women, better than me in some other areas far more important (at least IMHO) than the vice they have given into. A vice that is very liable ultimately to kill them.
In such instances, I do not castigate ... but I do try and directly witness to them and influence them through persuasion and long suffering away from it, while extolling their other very good traits.
... they also know that while in my house they cannot engage in their habit and they respect that.