Quotation of the Moment: Pi Day (#2)

"Frustra laborant quotquot se calculationibus futigant pro inventione quadraturae circuli."

"Futile is the labor of those who fatigue themselves with calculations to square the circle."

--Michael Stifel (1544)

People who attempt to "square the circle" are trying to prove that the perimeter of a square is equivalent to the circumference of a circle.  Their proofs usually generate rational values of pi.
Hat tip: History of Pi by Petr Beckmann