Peter follows, John remains, by Augustine of Hippo, 354-430 A.D.
“The Lord either said what he said to Peter about his martyrdom, or he said it about the gospel of John. As regards the martyrdom and this ‘Follow me,’ [he means] suffer for me, suffer what I did. Because Christ was crucified, Peter too was crucified… while John experienced none of this. That is what is meant by, ‘It is thus that I wish him to remain.’ Let him fall asleep without wounds, without torment, and wait for me. You, Peter, ‘Follow me,’ suffer what I did. That’s one way these words can be explained…

“As regards the Gospel of John, though, this is what I think is meant: that Peter wrote about the Lord, others too wrote; but their writing was more concerned with the Lord’s humanity… But while there is something about the divinity of Christ in Peter’s letters, in John’s gospel it is very much to the fore… He soared above the clouds and soared above the stars, soared above the angels, soared above every creature and arrived at the Word through which all things were made.” (excerpt from Sermon 253.5.5)