It is a bit of all the above. People select marriage partners who are trust worthy, stable, and not constantly looking for excitement. These same people, when

It is a bit of all the above. People select marriage partners who are trust worthy, stable, and not constantly looking for excitement. These same people, when they find a suitable spouse, are more likely to tough it out when things get unpleasant in the belief their spouse is fundamentally a good person. In marriage just like at work, you don’t judge someone by one event. People may have a bad day. Or they are sick and not themselves. Instead you should judge their actions over a long period of time. If someone has always been there for you, appreciated you and delivered what they promised, and for some reason hurt you today; you are more likely to give them the benefit of the doubt.