1. Nicotine is 10% of the quitting process?
2. That unlearning the habit/psycological addiction is what makes people smoke after they've quit and is the other 90%?
While you are still a smoker, nicotine is what creates the physical need to have another.
Once you stop using it, nicotine is out of your body in 72 hours.
So why is quitting so hard once the nicotine is out of your body?
The answer is number 2.
Take the 130 day challenge from your last puff and you are well on your way to freedom.
You can't have a forever quit if you can't get through the first 130 days. Commit to that amount of time and you will not be thinking of smoking or being a smoker but rarely.