Augustine of Hippo
Catena Aurea · Johannesevangelium 4
And many of the Samaritans of that city believed on him for the saying of the woman, which testified, He told me all that ever I did. So when the Samaritans were come unto him, they besought him that he would tarry with them: and he abode there two days. And many more believed because of his own word; And said unto the woman, Now we believe, not because of thy saying: for we have heard him ourselves, and know that this is indeed the Christ, the Saviour of the world.
(Tr. xv. c. 33) So then they knew Christ first by report of another, afterwards by His own presence; which is still the case of those that are without the fold, and not yet Christians. Christ is announced to them by some charitable Christians, by the report of the woman, i. e. the Church; they come to Christ, they believe on Him, through the instrumentality of that woman; He stays withthem two days, i. e. gives them two precepts of charity. And thenceforth their belief is stronger. They believe that He is indeed the Saviour of the world.