Musar על יבמות 125:14

If so, it is fitting for a person to practice this approach. If he sees a person doing evil to him and angering him - if there is a good side to [that person], that he does good to others or [has] a good trait that he practice appropriately, that side should suffice for him to nullify his anger from upon him. And his heart [should] be appeased about him; and he [should] desire kindness and say, "It is enough for me with this goodness that he has." And all the more so [is this the case] with his wife; as our Rabbis explained (Yevamot 63a), "It is enough that they raise our children, and save us from sin." So should he say about every person, "It is enough for me with x goodness that he did for me," or "that he did with y," or "[with the] good trait z that he has." He will [hence] be desiring kindness.