The variety of human characters, in their secret selfhood and in their social play,—the variety of languages through which they express themselves and their states, all based on that infinitely fine system of molecular motions in the nerve-centres where the individual and the universal meet and blend and react in volitional or reflex manifestation,—the variety of modes and degrees in which characters are modified under the influence of passion within or society and custom without,—the variety of changes in the adaptation of expression to character, perpetually altering with the altering situations,—such are the elements of the dramatic art. What cannot be said can be sung; what cannot be sung can be looked; what cannot be looked can be gesticulated; what cannot be gesticulated can be danced; what cannot be danced can be sat or stood,—and be understood. The knowledge of these elements properly formulated and systematized composes the true standard of dramatic criticism. It is obvious enough how few of the actors and critics of the day possess this knowledge. Without it the player has to depend on intuition, inspiration, instinct, happy or unhappy luck, laborious guess-work, and servile imitation. He has not the safe guidance of fundamental principles. Without it the critic is at the mercy of every bias and caprice. Now, one of the greatest causes of error and injustice in acting and in the criticism of acting is the difficulty of determining exactly how a given character in given circumstances will deport and deliver himself. With what specific combinations of the nine dramatic languages of human nature, in what relative prominence or subtlety, used with what degrees of reserve or explosiveness, will he reveal his inner states through outer signs? Here the differences and the chances for truthful skill are innumerable; for every particular in expression will be modified by every particular in the character of the person represented. What is perfectly natural and within limits for one would be false or extravagant for another. The taciturnity of an iron pride, the demonstrativeness of a restless vanity, the abundance of unpurposed movements and unvocalized sounds characteristic of boorishness and vulgarity, the careful repression of automatic language by the man of finished culture, are illustrations.