The celebrity of Alfieri generally invites the reader of _Don Carlos_ to compare it with _Filippo_. Both writers treat the same subject; both borrow their materials from the same source, the _nouvelle historique_ of St. Réal: but it is impossible that two powerful minds could have handled one given idea in more diverse manners. Their excellencies are, in fact, so opposite, that they scarcely come in competition. Alfieri's play is short, and the characters are few. He describes no scene: his personages are not the King of Spain and his courtiers, but merely men; their place of action is not the Escurial or Madrid, but a vacant, objectless platform anywhere in space. In all this, Schiller has a manifest advantage. He paints manners and opinions, he sets before us a striking pageant, which interests us of itself, and gives a new interest to whatever is combined with it. The principles of the antique, or perhaps rather of the French drama, upon which Alfieri worked, permitted no such delineation. In the style there is the same diversity. A severe simplicity uniformly marks Alfieri's style; in his whole tragedy there is not a single figure. A hard emphatic brevity is all that distinguishes his language from that of prose. Schiller, we have seen, abounds with noble metaphors, and all the warm exciting eloquence of poetry. It is only in expressing the character of Philip that Alfieri has a clear superiority. Without the aid of superstition, which his rival, especially in the catastrophe, employs to such advantage, Alfieri has exhibited in his Filippo a picture of unequalled power. Obscurity is justly said to be essential to terror and sublimity; and Schiller has enfeebled the effect of his Tyrant, by letting us behold the most secret recesses of his spirit: we understand him better, but we fear him less. Alfieri does not show us the internal combination of Filippo: it is from its workings alone that we judge of his nature. Mystery, and the shadow of horrid cruelty, brood over his Filippo: it is only a transient word or act that gives us here and there a glimpse of his fierce, implacable, tremendous soul; a short and dubious glimmer that reveals to us the abysses of his being, dark, lurid, and terrific, 'as the throat of the infernal Pool.' Alfieri's Filippo is perhaps the most wicked man that human imagination has conceived.