The classifications of 'early' and 'middle-period' dialogues rest squarely on the interpretative theses concerning the progress of Plato's work, philosophically and literarily, outlined above. As such, they are an unsuitable basis for bringing anyone to the reading of these works. To use them in that way is to announce in advance the results of a certain interpretation of the dialogues and to canonize that interpretation under the guise of a presumably objective order of composition—when in fact no such order is objectively known. And it thereby risks prejudicing an unwary reader against the fresh, individual reading that these works demand. For these reasons, I urge readers not to undertake the study of Plato’s works holding in mind the customary chronological groupings of 'early', 'middle', and 'late' dialogues. It is safe to recognize only the group of six late dialogues. Even for these, it is better to relegate thoughts about chronology to the secondary position they deserve and to concentrate on the literary and philosophical content of the works, taken on their own and in relation to the others.
Plato