This chapter was added to counteract the Johannine influence and exalt the Petrine teachings so dear to Rome.
In the Johannine tradition this saying has become “I am the light of the world.”
The cosmology is thoroughly Johannine, and only awaits the name of the Logos.
Love is the ‘very self-hood’ of God, says Ruysbroeck in strict Johannine language.
Moreover, in the rest of the Johannine literature there is no recognition of the episcopacy.
The next passage pointed out as derived from the Johannine Gospel occurs in the same chapter: "My sheep hear my voice."
The Fourth Gospel, which had superseded other and older gospels, was generally read in the Johannine churches.
There is another important testimony against the Johannine origin of the fourth Gospel to which we must briefly refer.
In it he collected with great fulness and discussed with marked moderation the arguments against Johannine authorship.
The evidence, however, for attributing all the Johannine books to the son of Zebedee is exceedingly strong.