Quotes from work
Agamemnon

Aeschylus Original title Ἀγαμέμνων

“Sole cure of wrong is silence.”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, line 548 (tr. E. D. A. Morshead)

“I hold my own mind and think apart from other men.”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, line 757

“And she who, like a swan,
Has chanted out her last and dying song,
Lies, loved by him.”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, lines 1444–1446 (tr. E. H. Plumptre)

“A great ox stands on my tongue.”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, lines 36–37

“Only when man's life comes to its end in prosperity can one call that man happy.”

Aeschylus Agamemnon

Call no man happy till he is dead.
Also attributed to Sophocles in "Oedipus The King".
Hold him alone truly fortunate who has ended his life in happy well-being.
Source: Oresteia (458 BC), Agamemnon, lines 928–929. Variant translations:

“I pray the gods will give me some relief
And end this weary job. One long full year
I've been lying here, on this rooftop,
The palace of the sons of Atreus,
Resting on my arms, just like a dog.
I've come to know the night sky, every star,
The powers we see glittering in the sky,
Bringing winter and summer to us all,
As the constellations rise and sink.”

Aeschylus Agamemnon

opening lines
Oresteia (458 BC), Agamemnon

“Clytemnestra: He collapsed, snorting his life away,
spitting great gobs of blood all over me,
drenching me in showers of his dark blood.
And I rejoiced—just as the fecund earth
rejoices when the heavens send spring rains”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, lines 1388–1392 (tr. Ian Johnston)

“Prolific truly is the impious deed;
Like to the evil stock, the evil seed.”

Aeschylus Agamemnon

Source: Oresteia (458 BC), Agamemnon, lines 758–760 (tr. Anna Swanwick)

“Old men are always young enough to learn.”

Aeschylus Agamemnon

Variant translation: Learning is ever in the freshness of its youth, even for the old.
Source: Oresteia (458 BC), Agamemnon, line 584 ( line 583 of Richmond Lattimore's translation http://books.google.com/books?id=3duN7nP3OQYC&q=%22old+men+are+always+young+enough+to+learn%22&pg=PA40#v=onepage)