“He who studies good painting and sculpture … must necessarily have acquired a good method in art. Hence springs the invention which groups figures in fours, sixes, tens, twenties, in such a manner as to represent battles and other great subjects of art.  This invention demands an innate propriety springing out of harmony and obedience; thus if a figure move to greet another, the figure saluted having to respond should not turn away … He [the artist] must always take care … that everything is in relation to the work as a whole; so that harmonious unity, wherein the passions strike terror, and the pleasing effects shed sweetness, representing directly the intention of the painter, and not the things he had not thought of.”—–from LIVES OF THE ARTISTS by Giorgio Vassari, 1568.