Treating a Believer Who Continues in Persistent Sin
The struggle with pornography is a serious issue that can have profound effects on a marriage and an individual's relationship with God. Paul writes in Romans 8:28 that "all things work together for good to them that love God," but this promise does not negate the need for believers to confront and repent of sin. The fact that your husband has been struggling with this issue for a decade and that you often have to confront him about it suggests a deep-seated problem that may be indicative of a heart that is not fully surrendered to Christ.
This is a difficult and painful situation, and it is understandable that you would wonder at what point you should treat your husband as an unbeliever. The Bible teaches that believers will struggle with sin, but it also teaches that true believers will demonstrate a desire to repent and turn from sin. If your husband is not demonstrating this desire, it may be necessary to re-evaluate the state of his faith.
It is essential to approach this situation with a balance of truth and compassion, recognizing that your husband's struggle with pornography is a symptom of a deeper spiritual issue. Rather than simply treating him as an unbeliever, it may be more helpful to encourage him to seek help and support in his struggle, and to pray for him to experience a deeper conversion and repentance. Ultimately, the goal should be to see your husband come to a place of genuine repentance and faith, rather than simply trying to manage the symptoms of his sin.