SOCRATES: Or again, he may be misled, and then he will say—'No, it is a figure made by the shepherds.'
PROTARCHUS: Yes.
SOCRATES: And if he has a companion, he repeats his thought to him in articulate sounds, and what was before an opinion, has now become a proposition.
PROTARCHUS: Certainly.
SOCRATES: But if he be walking alone when these thoughts occur to him, he may not unfrequently keep them in his mind for a considerable time.
PROTARCHUS: Very true.
SOCRATES: Well, now, I wonder whether you would agree in my explanation of this phenomenon.
PROTARCHUS: What is your explanation?
SOCRATES: I think that the soul at such times is like a book.
PROTARCHUS: How so?