Neither written words, nor continuous speech, will produce any serious effect in teaching. Dialectic and cross-examination are necessary 34 The Dialectician and Cross-Examiner is the only man who can really teach. If the writer can do this, he is more than a writer 37 Lysias is only a logographer: Isokrates promises to become a philosopher 38 Date of the Phædrus--not an early dialogue _ib._ Criticism given by Plato on the three discourses--His theory of Rhetoric is more Platonic than Sokratic _ib._ His theory postulates, in the Rhetor, knowledge already assured--it assumes that all the doubts have been already removed 39 The Expositor, with knowledge and logical process, teaches minds unoccupied and willing to learn _ib._ The Rhetor does not teach, but persuades persons with minds pre-occupied--guiding them methodically from error to truth 40 He must then classify the minds to be persuaded, and the means of persuasion or varieties of discourse. He must know how to fit on the one to the other in each particular case 41 Plato's _Idéal_ of the Rhetorical Art--involves in part incompatible conditions--the Wise man or philosopher will never be listened to by the public _ib._ The other part of the Platonic _Idéal_ is grand but unattainable--breadth of psychological data and classified modes of discourse 42 Plato's ideal grandeur compared with the rhetorical teachers--Usefulness of these teachers for the wants of an accomplished man 44 The Rhetorical teachers conceived the Art too narrowly: Plato conceived it too widely. The principles of an Art are not required to be explained to all learners 45 Plato includes in his conception of Art, the application thereof to new particular cases. This can never be taught by rule 46 Plato's charge against the Rhetorical teachers is not made out 47 Plato has not treated Lysias fairly, in neglecting his greater works, and selecting for criticism an erotic exercise for a private circle 47 No fair comparison can be taken between this exercise of Lysias and the discourses delivered by Sokrates in the Phædrus 48 Continuous discourse, either written or spoken, inefficacious as a means of instruction to the ignorant 49 Written matter is useful as a memorandum for persons who know--or as an elegant pastime 50 Plato's didactic theories are pitched too high to be realised 51 No one has ever been found competent to solve the difficulties raised by Sokrates, Arkesilaus, Karneades, and the negative vein of philosophy _ib._ Plato's _idéal_ philosopher can only be realised under the hypothesis of a pre-existent and omniscient soul, stimulated into full reminiscence here 52 Different proceeding of Plato in the Timæus 53 Opposite tendencies co-existent in Plato's mind--Extreme of the Transcendental or Absolute--Extreme of specialising adaptation to individuals and occasions 54 CHAPTER XXVII. PARMENIDES.