Isaeus (Latin;
Greek Isaios), fl. early 4th century BC. One of the ten
Attic Orators according to the
Alexandrian canon. He was a student of
Isocrates in
Athens, and later taught
Demosthenes while working as a
metic speechwriter for others. Only eleven of his speeches survive, with fragments of a twelfth. They are mostly concerned with inheritance, with one on
civil rights.
Dionysius of Halicarnassus compared his style to
Lysias, although Isaeus was more given to employing
sophistry.
Life
The time of his birth and death is unknown, but all accounts agree in the statement that he flourished () during the period between the
Peloponnesian War and the accession of
Philip II of Macedon, so that he lived between 420 BCE and 348 BCE.Dionysius,
Isaeus 1; Plutarch,
Lives of the Ten Orators p. 839; Anon., γένος Ἰσαίου. He was a son of
Diagoras, and was born at
Chalcis in
Euboea; some sources say he was born in
Athens, probably only because he came there at an early age and spent the greater part of his life there.
He was instructed in
oratory by
Lysias and
Isocrates.Photius,
Bibliotheca cod. 263; Dionysius and Plutarch,
locc. citt. He was afterwards engaged in writing judicial orations for others, and established a rhetorical school at Athens, in which
Demosthenes is said to have been his pupil. The
Suda states that Isaeus instructed him free of charge, whereas
Plutarch relates that he received 10,000
drachmas;Cf....
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