It is a viscious cycle for some people, smoking and quitting smoking. Just when they think they've got it licked, the craving hits and they decide, "one cigarette won't hurt". Ah, but that one cigarette then leads to another and another.
Smoking has one of the highest rates of recitivism or relapse. Several studies say it may take up to 7 quit attempts before finding lasting cessation success. Yep, smoking and quitting smoking are link the ying and yang of addiction.
Listen, if you are smoking and desire to quit, then realize there will be times during the quit attempt when the cravings will get intense. You can't quit as easily as you started. There's a video of some little kid smoking, so it doesn't take a rocket scientist to start the nasty habit. However, it does take dedication to the decision to quit to be successful.
Smoking and quitting smoking may be a tough cycle for you to get out of, but you can do it. Just stick with it and you'll find lasting success. Just be prepared and keep telling yourself the reasons why you want to quit.