From time to time, a stubborn and longstanding perplexity resolves suddenly into an intelligible pattern. An opacity clarifies, a lacuna is illumined, and one sees for the first time how to begin thinking about it. The ordered relations of a great mass of ideas are revealed as a new node in their net is neatly knit together, and unsuspected connections to other domains of inquiry suggest themselves. Thoughts that had been stymied by confusion pour forth in a generous, refreshing cascade. Things fall into place.
This recently happened to me respecting the Holy Spirit. I had never known quite how to think about him, had never understood quite what he does within the Trinity. He doesn’t get much attention, compared to the other two Persons. When he does, he is usually spoken of as the Love that flows between the Father and the Son, or as the Life of the Trinity. But these characterizations, while true enough, don’t get at the nub of it. The Holy Spirit is a person, and a person is not just his love or his life, but rather their subject.
What is it that the Spirit experiences, then, that is different from what the Son and Father experience of each other? What does he add to what they are, and know, and do? None of the explanations I had read quite hung together; there seemed to be little to hang them on. I had nothing to work with, nothing I felt I could lay hands on, until the other day, when at last pneumatology began to open to me.