180. And here, again, you must not turn aside your thoughts to lower things, because there seems to be some difference between a Fount and a River, and yet the divine Scripture has provided that the weakness of human understanding should not be injured by the lowliness of the language. Set before yourself any river, it springs from its fount, but is of one nature, of one brightness and beauty. And do you assert rightly that the Holy Spirit is of one substance, brightness, and glory with the Son of God and with God the Father. I will sum up all in the oneness of the qualities, and shall not be afraid of any question as to difference of greatness. For in this point also Scripture has provided for us; for the Son of God says: “He that shall drink of the water which I will give him, it shall become in him a well of water springing up unto everlasting life.” S. John iv. 14. This well is clearly the grace of the Spirit, a stream proceeding from the living Fount. The Holy Spirit, then, is also the Fount of eternal life.