How did you reach the conclusion that the author specifically meant this part of Gregory of Nyssa's religious thinking? It could just as likely be that the author has come to realise that Gregory of Nyssa was correct in his arguments for the Christian Trinity...? I am just wondering. The author's statements are very entertaining, but they do not seem to be articulated as objects for detailed scrutiny...

Read the Wikipedia entry, it was the other notable thing besides theology, and something I think everyone, no matter the creed, agrees with today