We all have willpower abilities contained within our minds. But, it's more developed in some people than in others. Willpower can be described as that little voice in the back of your head motivating you to take that first step towards quitting smoking. And a well-developed willpower strategy can be an important part of any overall plan to quit.
Some smokers have the ability to use their willpower to quit their addiction to nicotine cold-turkey. Most do not. However if you combine well-developed willpower strategies with scientific and other evidence based methods, you greatly improve your chances to quit smoking permanently.
Willpower can be added to any plan. It is the ability to talk ourselves out of smoking and in to staying a non-smoker when a craving comes along. Like a muscle, the more you use it, the stronger it gets.
Source: I Can Quit (Australia)