In life, we’re going to experience unknown situations, people, and things. In our relationship, we are going to be continually confronted with differences in others’ stories. Not everything is going to go our way or adhere to how we like things to be. If Mark’s spouse doesn’t do what he does, like the same things, sound the same way, or act as he’d like — he’s going to have to let some of those things be as they are, else he (and us) is going to be miserable. We aren’t our spouse no matter how similar we may appear.