João 4
Eusebius of Caesarea · Comentário Patrístico (catena)
João 4:10
And in that day it says, "Living water shall come forth out of Jerusalem." This is that spiritual, sweet, life-giving and saving drink of the teaching of Christ. He speaks of it in the Gospel according to John, when instructing the Samaritan woman.… What was this drink, then, that came forth from Jerusalem? For it was there that its gospel went forth and its heralds filled the world. This is what is meant by the words "The living water shall go forth to the first sea and the last sea," by which is meant the bounds of the whole world. That which is toward the eastern ocean is called "the first sea," that toward the west is meant by "the last sea," which, indeed, the living water of the saving gospel teaching has filled. He also taught about this when he said, "Whosoever shall drink of the water, which I shall give him, shall never thirst." — PROOF OF THE GOSPEL 6.18.48-49
João 4:10
And in them too the rest of the prophecy was fulfilled, when on the day of our Savior's coming living water came forth from Jerusalem. The fruitful living word of Jerusalem, yes, from Jerusalem itself, and was spread over all the earth, even to the utmost bounds of the world. The Lord and Savior himself speaks of this water to the Samaritan woman.… And he goes on to teach what advantage would accrue to everyone who tastes of the living spiritual spring. Those that drink of it, denying the many evil demons who ruled them of old, will confess their one Lord and King, and that the Lord, who once was known only to the Hebrews, will become King of all nations that believe in him from all the earth, and that his name will be one, encircling all the earth and the wilderness. And who is not struck at seeing this fulfilled? For the Christian name, derived from the name of Christ (and Christ was indeed the Lord) has encircled every place and city and land and the very nations that dwell in the wilderness and at the ends of the earth, as the prophecy foretold. — PROOF OF THE GOSPEL 10.7.7-8