This is what extremely grieves us, that a man who never fought Should contrive our fees to pilfer, on who for his native land Never to this day had oar, or lance, or blister in his hand.
Men of sense often learn from their enemies. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war. . . .
Meton (astronomer in 5th century BC): With the straight ruler I set to work To make the circle four-cornered . [First allusion to the problem of squaring the circle]