When we talk about the Trinity as a doctrine consisting of three Persons in one Deity, we tend to feel that we have grasped it to some degree. That is the way it is with concepts and doctrines. But the Trinity is a story much more than it is a doctrine. (See The Infinite round Dance.) As a story, the Trinity is no more graspable than the wind as Nicodemus found out. That is the nature of stories: to be ungraspable. Try to grasp anything in a story and you lose everything but the fragment you grasp. Might as well grasp at a note or two of a song and try to get a hold of the song. The story of the Trinity is the story of the Paschal Mystery, told succinctly in the famous verse, Jn :17, that God sent God’s only Son out of love for the world so that the world would not be judged but saved. In the sending, the Spirit acted out the bond of love between the Father and the Son. The Trinity also enters into the stories of each and every one of us as, through the Spirit, we cry “Abba! Father!” So it is that the Spirit makes us joint heirs with Christ. Paul tells us that as the Spirit enters our stories, we participate in Christ’s suffering and glory so that our own sufferings are shared by Christ and Christ’s glory becomes ours. After the threefold cry of “Holy!” in the temple, the Spirit sends the prophet Isaiah as the Father sends the Son and the Holy Spirit. Like Isaiah, we are sent by the Son and the Spirit to each other.
The Trinity as story shows us that a person is not a rugged individualist but is, in its very essence, a person is relationship. No relationship, no person. Our analogies with stories and music help us again here. The words of a story or a poem have very limited meaning individually but they take on much meaning in relationship to one another. The same is true with individual notes becoming a song when joined one to another. A triad is made up of three notes but it is one chord. The Persons of the Trinity hold nothing back from one another and ideally neither should we with one another. Trying to grasp our non-existent individuality is like trying to grasp a story or a song or the wind. If we are to be ourselves, we must let go as the Persons of the Trinity are always letting go so that we always go where we are sent whether it is halfway around the world or—as is most often the case—to the person next to us.