Couples left to their own resources oscillate between closeness and distance. Two people having this imbalance often have difficulty resolving it by themselves. To stabilize the relationship, the couple often seek the aid of a third party to help re-establish closeness. A triangle is the smallest possible relationship system that can restore balance in a time of stress. The third person assumes an outside position. In periods of stress, the outside position is the most comfortable and desired position. The inside position is plagued by anxiety, along with its emotional closeness. The outsider serves to preserve the inside couple's relationship. Bowen noted that not all triangles are constructive – some are destructive.
