under this character he is present throughout the dialogue. He is the true
prophet who has an insight into the natures of men, and can divine their
future; and he knows that sympathy is the secret power which unlocks their
thoughts. The hit at Aristides, the son of Lysimachus, who was specially
committed to his charge in the Laches, may be remarked by the way. The
attempt to discover the definition of knowledge is in accordance with the
character of Socrates as he is described in the Memorabilia, asking What is
justice? what is temperance? and the like. But there is no reason to
suppose that he would have analyzed the nature of perception, or traced the
connexion of Protagoras and Heracleitus, or have raised the difficulty
respecting false opinion. The humorous illustrations, as well as the
serious thoughts, run through the dialogue. The snubnosedness of
Theaetetus, a characteristic which he shares with Socrates, and the man-
midwifery of Socrates, are not forgotten in the closing words. At the end
of the dialogue, as in the Euthyphro, he is expecting to meet Meletus at
the porch of the king Archon; but with the same indifference to the result
which is everywhere displayed by him, he proposes that they shall
reassemble on the following day at the same spot. The day comes, and in
the Sophist the three friends again meet, but no further allusion is made
to the trial, and the principal share in the argument is assigned, not to
Socrates, but to an Eleatic stranger; the youthful Theaetetus also plays a
different and less independent part. And there is no allusion in the
Introduction to the second and third dialogues, which are afterwards
appended. There seems, therefore, reason to think that there is a real
change, both in the characters and in the design.

The dialogue is an enquiry into the nature of knowledge, which is
interrupted by two digressions. The first is the digression about the
midwives, which is also a leading thought or continuous image, like the
wave in the Republic, appearing and reappearing at intervals. Again and