Senator Kennedy was in Indianapolis, the night of April 4, 1968, when he learned that Dr. Martin Luther King, Jr., had been assassinated in Memphis on the balcony of the Lorraine Motel. The police left it up to RFK to tell the gathering crowd, including many African-Americans, that Dr. King was dead.
Speaking extemporaneously to his supporters, Bobby delivered the bad news (which Walter Cronkite had just broadcast on CBS News). At first people were shocked, and their screams of sadness visibly affected him. Then he calmly spoke from the heart, referencing his favorite poet.
This video, incorporating historical footage, is a clip of that speech. Many historians consider it to be one of Kennedy's most effective.
Although riots broke out in various parts of the country, as a result of Dr. King's death - such as the scenes depicted in these April, 1968 photos taken in Washington, D.C. - Indianapolis remained calm. Many law enforcement personnal attributed that fact to Bobby Kennedy's impact on the crowd and the sincere way in which he had addressed the people.
Dr. King is buried in Atlanta, Georgia on the grounds now owned by the King Center.
Bobby Kennedy's quote, in this clip, is from Aeschylus’ Agamemnon. He likely read it in a book (The Greek Way, by Edith Hamilton) which his sister-in-law, Jackie Kennedy, gave him to help cope with the shocking death of his brother, Jack.
RFK, speaking extemporaneously, misquoted Aeschylus. (Note his pause - at 3:18 into the clip - just before misquoting.) But the impact of that misquote (changing "despite" to "despair") has given the poem (and its sentiments) new meaning and greater popularity.
Let's compare the two versions.
In our sleep, pain which cannot forget falls drop by drop upon the heart until, in our own despair, against our will, comes wisdom through the awful grace of God.
Edith Hamilton's actual 1930 translation (see page 156) of Agamemnon:
And even in our sleep pain that cannot forget, falls drop by drop upon the heart, and in our own despite, against our will, comes wisdom to us by the awful grace of God.
For further study, note Hamilton's translation, with Greek phrases included:
And even in our sleep [d' ény' Ïpnou] pain that cannot forget [mnhsipÆmvn pÒnow], falls drop by drop [stãzei] upon the heart [prÚ kard€aw], and in our own despite [s°lma semnÚn ≤m°nvn], against our will [ka‹ par' êkontaw], comes wisdom to us [Σlye svfrone›n] by the awful grace of God [daimÒnvn d° pou xãriw b€aiow].
Edith Hamilton, The Greek Way (New York: W.W. Norton & Company Inc., 1930), page 156.
Credit for comparing the differences in Hamilton's translation and RFK's speech:
“In Our Own Despair”: Robert Kennedy, Richard Nixon, and Aeschylus’ Agamemnon. Delivered at the Classical Association of Canada, Annual Meeting, May 12, 2002, by Christopher S. Morrissey, Department of Humanities, Simon Fraser University.
Video online, courtesy Manny 535's Channel at YouTube.