[p. xlix]
ἔχει ἐν ἑωυτῷ αἷμα καὶ φλέγμα καὶ χολὴν ξανθήν τε καὶ
μέλαιναν, καὶ ταῦτα ὲστὶν αὐτῷ ἡ φύς1ις . . . ὑγιαίνει μὲν
οῦ̓ν μάλιστα ὁκόταν μετρίως ἔχῃ ταῦτα τῆς πρὸς ἄλληλα
κρήσιος καὶ δυνάμιος καὶ τοῦ πλήθεος, καὶ μάλιστα μεμιγμένα
ῆ̓́ κ.τ.λ. (Littré VI. 38 and 40).
Some thinkers, belonging to the school of Empedocles,
and being more inclined towards philosophy
than towards medicine, made the four chief opposites,
materialized into fire, air, water and earth,
the components of the body, and disease, or at
any rate some of the chief diseases, an excess of one
or other. We see this doctrine fairly plainly in
Menon's account of Philistion, and it is copied by
Plato in the Timaeus.
The doctrines I have described admitted many
variations, and in Menon's Iatrica, which is chiefly
an account of the origins of disease as given by
various physicians, the most diverse views are set
forth. Petron of Aegina, while holding that the
body is composed of the four opposites, stated that
disease was due to faulty diet, and that bile was
the result and not the cause of disease. Hippon
thought that a suitable quantity of moisture was the
cause of health ; Philolaus that disease was due to
bile, blood and phlegm ; Thrasymachus of Sardis
that blood, differentiated by excess of cold or heat
into phlegm, bile, or τὸ σεσηπός (matter or pus), was
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