Quintilian on The Critical Skills Grammarians Teach (ca. 95 CE)

While reading through Eric W. Scherbenske's "Canonizing Paul: Ancient Editorial Practice and the Corpus Paulinum," I came across a reference from Quintilian. He was sketching the critical skills taught as part of the standard literary education given by the Greek and Latin Grammarians (teachers); 

"As soon as the boy has learned to read and write without difficulty, it is the turn for the teacher of literature (grammatici). My words apply equally to Greek and Latin masters, though I prefer that a start should be made with a Greek: in either case the method is the same. This profession may be most briefly considered under two heads, the art of speaking correctly and the interpretation of poets; but there is more beneath the surface than meets the eye. For the art of writing is combined with that of speaking, and correct reading precedes interpretation, while in each of these criticism has work to perform. The old school of teachers (veteras grammatici) carried their criticism so far that they were not content with obelizing lines [marking for deletion] or rejecting books whose titles they regarded as spurious, as though they were expelling a supposititious child from the family circle, but also drew up a canon of authors, from which some were omitted altogether." (Inst. or. 1.4.1-3)

Quintilian notes here that it was customary for Grammarians to teach the art of analyzing a piece of literature for a correct textual reading as well as determining its authenticity in relation to an author's other writings. Of course, Quintilian is describing the ideal Greco-Roman education. It may have been uncommon for literates (of lesser or greater ability) to acquire this level of analytical skill. Nevertheless, the teaching of these critical skills appears to occur early in a child's literary education (soon after acquiring an adequate level of reading and writing ability). Thus, most literates may have had at least a rudimentary understanding of recognizing textual/transmission issues as well as the problems associated with authorship.  

Apostles, disciples, and other early Christian leaders who were literate, may have had at least some ability in analyzing and evaluating a particular writing's textual character or authorship claims.  This can be seen in Peter's assessment of those who have miss-interpreted and possibly textually altered Paul's epistles in 2 Peter 3:16, and Luke's evaluation of previous Gospel writings in 1:1-4. Similar parallels could be made with regard to the collecting of Ignatius's letters in Poly. Phil. 13.1-2.

Mosaic of Plato's academy (Pompeii)

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Quintilian, Institutio Oratoria (trans. H. E. Butler; LCL; London: William Heinman, 1920), 61-63.

Scherbenske, Eric W. Canonizing Paul: Ancient Editorial Practice and the Corpus Paulinum (Oxford: Oxford University Press, 2013), 16.