A relationship is a set of mutual expectations about each other’s future behavior based on past interactions with one another. We have a relationship when we can anticipate each other’s behavior to some degree. When we say we have a “good relationship,” this means that we feel a certain level of comfort with the other person, comfort that is based on this sense of knowing how the other will react. Further, we share confidence that we are both working toward a goal that we have agreed upon or take for granted. That feeling of comfort is often what we mean by the word trust. We “know” what to expect of each other. Our level of trust reflects the degree to which our behavior and the behavior of the other are consistent.

From Humble Leadership