Here are 30 positive affirmations to help with understanding and releasing smoking addiction, as well as managing withdrawal:

1. I am stronger than my addiction, and I can overcome it.

2. My body is healing, and I am freeing myself from the grip of nicotine.

3. I choose to breathe fresh, clean air, and to live a healthy, smoke-free life.

4. I release all cravings and temptations, knowing that I am in control.

5. My lungs are strong and healthy, and I am grateful for their ability to heal.

6. I am worthy of a life free from addiction, and I deserve to live it.

7. I trust myself to make positive choices, and to stay on the path to recovery.

8. My mind is clear and focused, and I am able to manage withdrawal symptoms with ease.

9. I am not a slave to my addiction, and I am breaking free from its hold.

10. My health and well-being are my top priority, and I am committed to taking care of myself.

11. I release all guilt and shame associated with my addiction, and I forgive myself.

12. My body is resilient, and I trust in its ability to recover from the effects of smoking.

13. I am capable of managing stress and anxiety without reaching for a cigarette.

14. I choose to surround myself with positive, supportive people who encourage my recovery.

15. My subconscious mind is working in my favor, helping me to overcome my addiction.

16. I am proud of myself for taking the first step towards a smoke-free life.

17. I trust that I can handle any challenge that comes my way, and that I will stay on track.

18. My life is valuable, and I am worth saving from the dangers of smoking.

19. I release all emotional attachments to smoking, and I am free to move on.

20. I am grateful for the support of my loved ones, and for their encouragement on my journey to recovery.

21. My addiction is not a part of my identity, and I am more than my habits.

22. I choose to focus on the present moment, and to let go of worries about the past or future.

23. I am strong and resilient, and I can get through any difficult moment without smoking.

24. My mental and emotional well-being are improving with each passing day.

25. I trust that my body is healing, and that I am becoming healthier with each passing day.

26. I release all feelings of deprivation, knowing that I am gaining so much more by quitting smoking.

27. I am capable of finding healthy ways to manage stress and anxiety, such as exercise and meditation.

28. My self-esteem is growing, and I am proud of my accomplishments.

29. I am worthy of love, care, and respect – from myself and others – regardless of my past habits.

30. I am free from the grip of smoking, and I am living a happy, healthy, and fulfilling life.

Remember, that affirmations are most effective when they are personalized and spoken in the present tense, as if the desired outcome has already occurred. Repeat these affirmations to yourself regularly, especially during times of stress or temptation, to help stay on track with your recovery.

Would you like me to come up with more affirmations or is there something else I can help you with?