Recently there have been some discussions amongst my online friends about the nature of the Trinity following a statement made by a visiting lecturer to Asbury Theological Seminary. I wasn't at the lecture, but from all accounts the suggestion was made that, as Jesus cried "My God, my God, why have you forsaken me?" (Matt 27:46) on the cross that there was, at that moment, a split in the Trinity. You can read more on the details of the lecture and some responses at both Jeffrey Rudy's and Isaac Hopper's respective blogs. Of course, for anything to do with Trinitarian theology Gregory of Nyssa, as one of the Cappadocian Fathers, will have something important to say. Whilst he doesn't address the issue of a split in the Trinity with regards to Jesus on the cross, he does address the suggestion of a split, albeit under a different guise. Gregory in On the Holy Spirit is addressing the suggestion from Macedonius that the Holy Spirit was just "a divine ...