The circle has long been regarded as the most perfect of forms for the uniformity which it represents; the feet, as the body's connection to earthly matter ("feet of clay", etc). A ball with feet is therefore a kind of synthesis of the divine with the material, and could therefore be seen as a kind of "ultimate lifeform", the final purpose of which to either destroy or rule over the imperfect synthesis that is mankind. We prefigure this day of reckoning in our dreams, and our art.