I think Rycroft put it very well. With counselling, there needs to be a short-term plan to sort out pressing problems, as well as a long-term problem to deal with underlying issues. Both partners behaviour has to change permanently for the situation to change permanently. You both need to learn new communication and coping techniques, different ways to deal with conflict and how to work together to find mutually-acceptable solutions.
Going for marriage counseling can be compared to going on a diet. If your only goal in going on a diet is to lose a lot of weight very quickly and then go back to your old way of eating, you may lose that weight initially, but it will all come back again when you resume your old habits. When your goal is to learn a healthier, better way of living, with a long term goal in mind, then you will have much more effective and satisfactory results. It’s the same with marriage counseling; you aim to learn over time a new way of living, a new way of relating to your spouse which is marked by respect, intimacy and true love which never fails.