August Wilhelm von Schlegel

“The tragic style of Aeschylus (I use the word "style" in the sense it receives in sculpture, and not in the exclusive signification of the manner of writing,) is grand, severe, and not unfrequently hard: that of Sophocles is marked by the most finished symmetry and harmonious gracefulness: that of Euripides is soft and luxuriant; overflowing in his easy copiousness, he often sacrifices the general effect to brilliant passages. The analogies which the undisturbed development of the fine arts among the Greeks everywhere furnishes, will enable us, throughout to compare the epochs of tragic art with those of sculpture. Aeschylus is the Phidias of Tragedy, Sophocles her Polycletus, and Euripides her Lysippus. Phidias formed sublime images of the gods, but lent them an extrinsic magnificence of material, and surrounded their majestic repose with images of the most violent struggles in strong relief. Polycletus carried his art to perfection of proportion, and hence one of his statues was called the Standard of Beauty. Lysippus distinguished himself by the fire of his works; but in his time Sculpture had deviated from its original destination, and was much more desirous of expressing the charm of motion and life than of adhering to ideality of form.”
― August Wilhelm Schlegel, Lectures on Dramatic Art and Literature