13. For oftentimes it is convenient to estimate from our own words those things which are above us, and because we cannot see those things we draw inferences from those which we can see. “For the invisible things of Him,” says the Apostle, “from the creation of the world are clearly seen, being understood by those things which are made.” Rom. i. 20. And he adds: “His eternal power also and Godhead.” Rom. i. 20. Of which one thing seems to be said of the Son, and another of the Holy Spirit; that in the same manner as the Son is called the eternal Power of the Father, so, also, the Spirit, because He is divine, should be believed to be His eternal Godhead. For the Son, too, because He ever lives, is eternal life. This Finger, then, of God is both eternal and divine. For what is there belonging to God which is not eternal and divine?