Ball bearings. What is the power in perfection? A perfect day, not much better than a good day, justifies a life; a perfect face, not much better than a good face, launches 1000 ships; and a perfect little metal sphere, not much rounder than a toy marble, allows us to remake the world. If we can but learn to make a perfect sphere of hydrogen, rounder than round by an invisible increment, we can have our power from tame stars. Sometimes striving for perfection is foolish, the enemy of the good; but perfection itself should not be despised—when the key fits, doors open.
— Paul M. Rodriguez