Never doubt your ability to overcome an addiction. Fact is if you have the belief that you have the ability to stay clean, or overcome an addiction, your mindset can see you attain victory.Entertain not negative thoughts like, "how will I survive without . . . will my friends abandon me, etc, etc and you'll a step closer to winning the battler [against addiction]. "Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence."