Kennedy's speech on the assassination of Martin Luther King, Jr.

I know I told you I was going to talk about global issues in my next entry. But I have watched Bobby Kennedy's speech on the Assassination of Martin Luther King, Jr. and something has grasped my attention. He mentions  Aeschylus and then recites a few lines of a poem:

"Even 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."

 Here you have the original poem.

Wisdom comes through suffering.
Trouble, with its memories of pain,
Drips in our hearts as we try to sleep,
So men against their will
Learn to practice moderation.
Favours come to us from gods.

Aeschylus (525-456 BC) Greek dramatist (Æschylus)
Agamemnon, l. 179

Alt. trans.:
"He who learns must suffer
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."

I have found out that the above alternate was misquoted by Robert Kennedy in his speecn on the assassination of Martin Luther King (4 Apr 1968). Kennedy's family used it as an epitaph on his grave Arlington National Cemetery:

"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."