On a global scale smoking kills six people per minute. The point is - smoking kills. To truly understand that fact will help you to change your mind. The next step is to understand how the dynamics of this addiction works in order to free yourself. Addictions manifest as urges.
Urges seek to be fed.
They vary in power and in frequency. When fed, they do in fact subside, temporarily, always returning for another feeding later. They are never satisfied. This will require a strength and focus that is often elusive when under the siege of withdrawal symptoms. In other words, the intense and random urges that make up the addictive chain must be dealt with.