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. . . .
Aristophanes (c.450 - c.385 BC)
Source: Birds, 414 BC
Contributed by: Zaady
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]
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