Do all marriages go through some difficult times?

Yes, for the most part one could say that every marriage has difficult times or, at least, times that are more "interesting" than others. Probably every marriage that lasts has its ups and downs, its zigs and zags. Actor Paul Newman once said that marriage can work as long as both people don’t go crazy at the same time. Making a marriage work means work. The spouses can easily drift into a habit of mind of taking each other for granted, not listening to one another and eventually not hearing one another at all.