what happens when you stop smoking

What is the best way to convince someone to quit smoking?
and my sister smokes (like a chimney!) and I love it that he would die if anything happened to her (no kidding), so I know that smoking is bad for you and your commandments, because it hurts the lungs and well but just not going to listen What can I do / say to convince her to quit?! thanks in advance and Happy New Year!
Both laws were 4 packs my daily smokers. I could not go home for 5 minutes without coughing violently. When my stepmother was finally diagnosed with lung cancer stage 4 (stage 4 means more hope in terms of cancer), while she endured the treatment of trying to prolong life, my father, let it not be exposed to more smoke. But when she died a short time, went right to smoke at the same pace. All smokers die of smoking deaths. Make sure you share with your sister. One of my neighbors died in his 70s and was known for being healthy and strong and always cheerful. When I comforted his widow, I asked if he had been sick and of course he had lung cancer. I was a little surprised since he knew long ago and has never known either to smoke, so I asked him how he had arrived. She said both drank the smoke and stopped in the early '70s, when it seems that smoking can kill, but it was too late for him and 30 years later, cancer developed and eventually died. So all this nonsense about every 10 years you do not smoke the risk of death from smoking reduces down is absurd. Your sister is planning of his death and I would treat it as seriously as her writing a suicide note. And they never around when she smokes, because the effects are equally serious.
What Happens When You Quit Smoking?