Translated by Ch. Browne and J. Swallow.
III. They then who are angry with us on the ground that we are bringing in a strange or interpolated God, viz.:—the Holy Ghost, and who fight so very hard for the letter, should know that they are afraid where no fear is;  and I would have them clearly understand that their love for the letter is but a cloak for their impiety, as shall be shewn later on, when we refute their objections to the utmost of our power. But we have so much confidence in the Deity of the Spirit Whom we adore,  that we will begin our teaching concerning His Godhead by fitting to Him the Names which belong to the Trinity, even though some persons may think us too bold. The Father was the True Light which lighteneth every man coming into the world. The Son was the True Light which lighteneth every man coming into the world. The Other Comforter was the True Light which lighteneth every man coming into the world.  Was and Was and Was, but Was One Thing. Light thrice repeated; but One Light and One God. This was what David represented to himself long before when he said, In Thy Light shall we see Light.  And now we have both seen and proclaim concisely and simply the doctrine  of God the Trinity, comprehending out of Light (the Father), Light (the Son), in Light (the Holy Ghost). He that rejects it, let him reject it;  and he that doeth iniquity, let him do iniquity; we proclaim that which we have understood. We will get us up into a high mountain,  and will shout, if we be not heard, below; we will exalt the Spirit; we will not be afraid; or if we are afraid, it shall be of keeping silence, not of proclaiming.
 Ps. liii. 5.
 presbeuein is not commonly used in this sense, but there are classical instances of it (e.g. AEsch. Choeph., 488; Soph., Trach., 1065, and it occurs also in Plato), and this is the sense in which it is here rendered by Billius; but a V. L. of some mss. gives the meaning, whose cause we are pleading, which is more frequent use of the word.
 John i. 9.
 Ps. xxxvi. 9.
 Al. The Confession.
 Isa. xxi. 2.
 Ib. xl. 9.
Reference address : https://www.elpenor.org/gregory-nazianzen/fifth-theological.asp?pg=2