“Zeus, who guided mortals to be wise,
has established his fixed law—
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
seated on their solemn thrones—
such grace is harsh and violent.”
Variant translations:
Zeus has led us on to know,
the Helmsman lays it down as law
that we must suffer, suffer into truth.
We cannot sleep, and drop by drop at the heart
the pain of pain remembered comes again,
and we resist, but ripeness comes as well.
From the gods enthroned on the awesome rowing-bench
there comes a violent love.
Robert Fagles, The Oresteia (1975)
God, whose law it is
that 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.
Edith Hamilton, The Greek Way (1930), pp. 61 and 194 ( Google Books https://books.google.com/books?id=D3QwvF3GWOkC&lpg=PA61&ots=BacvHvGm6e&dq=%22And%20in%20our%20own%20despite%2C%20against%20our%20will%2C%20Comes%20wisdom%22%20-kennedy&pg=PA194#v=onepage&q=%22our%20own%20despite%22&f=false)
Robert F. Kennedy quoted these lines in his speech announcing the assassination of Martin Luther King, Jr. on 4 April 1968. His version http://www.americanrhetoric.com/speeches/rfkonmlkdeath.html:
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.
Variant translations of πάθει μάθος:
By suffering comes wisdom.
The reward of suffering is experience.
Wisdom comes alone through suffering.
Source: Oresteia (458 BC), Agamemnon, lines 176–183, as translated by Ian Johnston ( Google Books https://books.google.com/books?id=qz1HpBZ1fTwC&lpg=PA13&ots=C7aohrZRF1&dq=Drips%20in%20our%20hearts%20as%20we%20try%20to%20sleep%2C&pg=PA13#v=onepage&q=Drips%20in%20our%20hearts%20as%20we%20try%20to%20sleep,&f=false)
Original
τὸν φρονεῖν βροτοὺς ὁδώ- σαντα, τὸν πάθει μάθος θέντα κυρίως ἔχειν. στάζει δ᾽ ἔν θ᾽ ὕπνῳ πρὸ καρδίας μνησιπήμων πόνος: καὶ παρ᾽ ἄ- κοντας ἦλθε σωφρονεῖν. δαιμόνων δέ που χάρις βίαιος σέλμα σεμνὸν ἡμένων.
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Aeschylus 119
ancient Athenian playwright -525–-456 BCRelated quotes

Speech on the Assassination of Martin Luther King, Jr. (1968)

Cassandra (1860)
Context: Give us back our suffering, we cry to Heaven in our hearts — suffering rather than indifferentism; for out of nothing comes nothing. But out of suffering may come the cure. Better have pain than paralysis! A hundred struggle and drown in the breakers. One discovers the new world. But rather, ten times rather, die in the surf, heralding the way to that new world, than stand idly on the shore!

Cardinal calls on faithful to have tender hearts during Lent https://www.catholicnewsagency.com/news/29155/cardinal-calls-on-faithful-to-have-tender-hearts-during-lent (5 March 2014)
On a Replica of the Parthenon

[2019, Esoterism as Principle and as Way, World Wisdom, 139, 978-1-93659765-9]
Spiritual life, Trials

These precepts were first collected as advice for Fuller's son John.
Compare Poor Richard's Almanack (1751) : Many a Man would have been worse, if his Estate had been better.
Introductio ad prudentiam: Part II (1727)

Opening address to the National Day of Prayer in Suva, 15 May 2005 (excerpts) http://www.fiji.gov.fj/publish/page_4607.shtml