Croesus, addressing Cyrus, says —
τὰ δὲ μοι παθήματα ἐόντα ἀχάριτα μαθήματα γέγονε.
My sufferings, though painful, have been my lessons.
— Herodotus • 1.207
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- Mathematical Duality in Logical Graphs • Discussion 2
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Inquiry Into Inquiry 
Αλλά η ερώτησή μου είναι, “το προφέρει Hero-Dot-μαζί μας ή Ηρώδη-Otus;”
I say the latter, but the former may have some cachet today —
• Hero.us