St. Gregory of Nazianzus (c. 329 – 25 January 390), also known as Gregory the Theologian or Gregory Nazianzen, was a 4th-century Archbishop of Constantinople, theologian, and one of the Cappadocian Fathers (along with Basil the Great and Gregory of Nyssa). He is widely considered the most accomplished rhetorical stylist of the patristic age. Gregory made a significant impact on the shape of Trinitarian theology among both Greek and Latin-speaking theologians, and he is remembered as the “Trinitarian Theologian”.
“The Holy Ghost, which proceeds from the Father; Who, inasmuch as He proceeds from That Source, is no Creature; and inasmuch as He is not Begotten is no Son; and inasmuch as He is between the Unbegotten and the Begotten is God. And thus escaping the toils of your syllogisms, He has manifested himself as God, stronger than your divisions. What then is Procession? Do you tell me what is the Unbegottenness of the Father, and I will explain to you the physiology of the Generation of the Son and the Procession of the Spirit, and we shall both of us be frenzy-stricken for prying into the mystery of God. And who are we to do these things, we who cannot even see what lies at our feet, or number the sand of the sea, or the drops of rain, or the days of Eternity, much less enter into the Depths of God, and supply an account of that Nature which is so unspeakable and transcending all words?”
~ from: The Orations and Letters of Saint Gregory Nazianzus, Oration 31 (5th Theological Oration), VIII.
First Thoughts 