What do "those grand lines in the Greek Tragedy" refer to (St. John Henry Newman quote)?

In his essay "*The Syllabus*" (which refers to the *Syllabus of Errors* attributable to Pope Bl. Pius IX.), St. John Henry Newman writes: The above is taken from pg. 105 of [*Newman's Letter to the Duke of Norfolk*](https://ia904704.us.archive.org/10/items/a678635200newmuoft/a678635200newmuoft.pdf) QUESTION: What does the line in Greek translates into, and which Greek Tragedy is St. John Newman alluding to? Here's the OCR of the Greek text (in Unicode UTF-8): οὔπωε τὰν Διὸς ἁρμονίαν θνατῶν παρεξίασι βουλαί.