Thucydides II. lxiv. 3. φέρειν τε χρὴ τά τε δαιμόνια ἀναγκὰιως, τά τε ἀπὸ τῶν πολεμίων ἀνδρείως The quotation is from the speech of Pericles to the Athenians in b.c. 430 in which he encourages and soothes them under adversity.