of 1980 at the Center for Advanced Study in the Behavioral Sciences
at Stanford, where I was made so happy and free from worries that
this and another larger book flowed from my typewriter without any
of the usual interruptions and frustrations. I am enormously grateful
to the Director and staff at the Center, and to Oxford University for
letting me go there.

To avoid footnotes, the few references have been consigned to the
end of the book, except for those to Plato, which are in brackets in
the text, giving the pages of Stephanus' edition as used in the margin
of nearly all modern editions and translations. References in
brackets preceded by 'p.' are to pages in this book. In the very few
Greek words I had to quote, and in proper names in the Index, I
have indicated the quantity of vowels by putting a bar over all the
long ones, and have used a system of transliteration which relates
the Greek words closely to modern English words derived from
them (for example, 'psy + ̄chē').

R. M. HARE

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