4 Faustus thinks himself wonderfully clever in proving that Matthew was not the writer of this Gospel, because, when speaking of his own election, he says not, He saw me, and said to me, Follow me; but, He saw him, and said to him, Follow me. This must have been said either in ignorance or from a design to mislead. Faustus can hardly be so ignorant as not to have read or heard that narrators, when speaking of themselves, often use a construction as if speaking of another.
It is more probable that Faustus wished to bewilder those more ignorant than himself, in the hope of getting hold on not a few unacquainted with these things. It is needless to resort to other writings to quote examples of this construction from profane authors for the information of our friends, and for the refutation of Faustus. We find examples in passages quoted above from Moses by Faustus himself, without any denial, or rather with the assertion, that they were written by Moses, only not written of Christ.
When Moses, then, writes of himself, does he say, I said this, or I did that, and not rather, Moses said, and Moses did? Or does he say, The Lord called me, The Lord said to me, and not rather, The Lord called Moses, The Lord said to Moses, and so on? So Matthew, too, speaks of himself in the third person. And John does the same; for towards the end of his book he says: "Peter, turning, saw the disciple whom Jesus loved, who also lay on His breast at supper, and who said to the Lord, Who is it that shall betray You?"
Does he say, Peter, turning, saw me? Or will you argue from this that John did not write this Gospel? But he adds a little after: "This is the disciple that testifies of Jesus, and has written these things; and we know that his testimony is true." Does he say, I am the disciple who testify of Jesus, and who have written these things, and we know that my testimony is true? Evidently this style is common in writers of narratives. There are innumerable instances in which the Lord Himself uses it.
"When the Son of man," He says, "comes, shall He find faith on the earth?" Not, When I come, shall I find? Again, "The Son of man came eating and drinking;" not, I came. Again, "The hour shall come, and now is, when the dead shall hear the voice of the Son of God, and they that hear shall live;" not, My voice. And so in many other places. This may suffice to satisfy inquirers and to refute scoffers.
Source: Reply to Faustus the Manichaean (New Advent)