154. These things are narrow and paltry, even between men, who for the most part, although they do not agree in action, yet agree in will. So that a certain person being asked what a friend is, answered, “A second self.” If, then, a man so defined a friend as to say, he was a second self, that is to say, through a oneness of love and good-will, how much more ought we to esteem the oneness of Majesty, in the Father, the Son, and the Holy Ghost, when by the same operation and divine power, either the unity, or certainly that which is more, the ταυτότης, as it is called in Greek, is expressed, for ταύτο signifies “the same,” so that the Father, the Son, and the Holy Spirit have the same; so that to have the same will and the same power does not arise from the affection of the will, but inheres in the substance of the Trinity.