Philip is in the military and often away for months at a time. some of his deployments are sensitive and he is not allowed to have any contact with his wife. in those times of isolation, using terms from sternberg’s triarchic theory of love, philip and his wife are relying on to keep them together.

Commitment

Explanation:

According to Robert Sternberg, there are three components of love: an intimacy component, a passion component and a decision/commitment component.

Intimacy is the feeling of closeness in a relationship, passion refers to physical attraction and commitment is each partners' decision to maintain this love.

Philip is away and he and his wife don't see each other every day, and there are periods of absolute silence between them. They don't know what they are doing when they are apart but they trust in one another, knowing the other person is waiting for them to reunite. It is commitment, meaning, even if the husband/wife are not together, they are still reunited in thoughts and no party does anything wrong to jeopardize their marriage.

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.