The answer
St. Ambrose says, “David said: ‘The stream of the river makes glad the city of God’ (Ps. 46:4). For neither is that city, the heavenly Jerusalem, watered by the channel of any earthly river, but that Holy Spirit, proceeding from the Fount of Life, by a short draught of Whom we are satiated, seems to flow more abundantly among those celestial Thrones, Dominions and Powers, Angels and Archangels, rushing in the full course of the seven virtues of the Spirit. For if a river rising above its banks overflows, how much more does the Spirit, rising above every creature, when He touches the, as it were, low-lying fields of our minds, make glad that heavenly nature of the creatures with the larger fertility of His sanctification.”900
Fr. Tadros Yacoub Malaty
Notes
900 St. Ambrose of Milan, On the Holy Spirit 1.16.177–178 (NPNF II/10:114).