If you differ on beliefs, morals or ethics, it could very well be problematic. This does have a lot to do with faith, and let’s face it, not all people of the same faith are equally faithful, and obviously those of different faiths altogether are a whole other ball game. I’m in no way suggesting people who marry must be of the same faith, same sect and share the exact same beliefs. As long as wherever it is they both stand in that matter, their stance does not clash or contradict each other majorly (I'm trying to get a delicate message across here without being too direct, but I feel like I'm only complicating it further). I don’t want to dwell on it too much because this could get slightly controversial. However it does shock me how some people do neglect this point. Here's an example of when couples may clash on such issues and how it could affect them:
The couple had a child, Rayan. As the mother, Deena felt she had the chance to influence her son more. Nawaf couldn’t care less, he was merely there to ensure his son became a man and that included a lot of distant tough love. As Rayan got older, Deena would encourage him to pray. His dad wouldn’t take him to Friday prayers at the mosque and she ashamedly asked her brother to take him every week. She was adamant not to let Rayan turn into his father. It was hard enough to see the man she loved so conflicting with her own beliefs, to see her son that way would be too painful to think about. Alas, the older Rayan grew, the more inquisitive he became; how come the rules don’t seem to be applying to his father?
And with very little effort from his father, Deena’s nightmare slowly began to come true. There doesn’t have to be any direct influence, Nawaf simply being there was influence enough. As the days went by, Deena saw Rayan slip through her fingers, and she resented her husband for it. The guy did nothing, he did not actively influence their son, but Deena spent her days passively punishing him for it. The tension continued to grow, her heart continued to break.