Spiritual and Not Religious
"We have only to believe that the miracle that we see working in the lives of clean addicts can happen to any addict with the desire to change. We simply realize there is a force for spiritual growth that can help us become more tolerant, patient, and useful." Basic Text Sixth Edition pg26
Narcotics Anonymous is a spiritual program and works based on the evidence of our own experience. We have found that by living the spiritual principles outlined in our steps we have succeeded in staying clean, and finding a new way to live.
Our Basic Text tells us "Many of us understand God to be simply whatever force keeps us clean." (pg 25, 6th edition). We are free to believe in God or not. As long as we are willing to live by spiritual principles will be able to benefit from the program. Whatever your belief you are welcome in NA.