Quotes from W. W. Rouse Ball

[Gauss calculated the elements of the planet Ceres] and his analysis proved him to be the first of theoretical astronomers no less than the greatest of 'arithmeticians.'

Throughout his life Newton must have devoted at least as much attention to chemistry and theology as to mathematics.

'My dear friend, that must be a delusion, what can a circle have to do with the number of people alive at a given time?'

Newton took no exercise, indulged in no amusements, and worked incessantly, often spending eighteen or nineteen hours out of the twenty-four in writing.