If any musical task is to be considered as having been accomplished, it is that of Debussy. For he wrote the one book that every great artist writes. He established a style irrefragably, made musical impressionism as legitimate a thing as any of the great styles. That he had more to make than that one contribution is doubtful. His art underwent no radical changes. His style was mature already in the Quartet and in "Proses lyriques," and had its climax in "Pelléas," its orchestral deployment in "Nocturnes" and "La Mer" and "Ibéria," its pianistic expression in the two volumes of "Images" for pianoforte. Whatever the refinement of the incidental music to "Le Martyre de Saint-Sébastien," Debussy never really transgressed the limits set for him by his first great works. And so, even if his long illness caused the deterioration, the hardening, the formularization, so evident in his most recent work, the sonatas, the "Epigrammes," "En blanc et noir," and the "Berceuse héroïque," and deprived us of much delightful art, neither it nor his death actually robbed us of some radical development which we might reasonably have expected. The chief that he had to give he had given. What his age had demanded of him, an art that it might hold far from the glare and tumult, an art into which it could retreat, an art which could compensate it for a life become too cruel and demanding, he had produced. He had essentially fulfilled himself.
The fact that "Pelléas" is the most eloquent of all Debussy's works and his eternal sign does not, then, signify that he did not grow during the remainder of his life. A complex of determinants made of his music-drama the fullest expression of his genius, decreed that he should be living most completely at the moment he composed it. The very fact that in it Debussy was composing music for the theater made it certain that his artistic sense would produce itself at its mightiest in the work. For it entailed the statement of his opposition to Wagner. The fact that it was music conjoined with speech made it certain that Debussy, so full of the French classical genius, would through contact with the spoken word, through study of its essential quality, be aided and compelled to a complete realization of a fundamentally French idiom. And then Maeterlinck's little play offered itself to his genius as a unique auxiliary. It, too, is full of the sense of the shadowiness of things that weighed upon Debussy, has not a little of the accent of the time. This "vieille et triste légende de la forêt" is alive with images, such as the old and somber castle inhabited by aging people and lying lost amid sunless forests, the rose that blooms in the shadow underneath Mélisande's casement, Mélisande's hair that falls farther than her arms can reach, the black tarn that broods beneath the castle-vaults and breathes death, Golaud's anguished search for truth in the prattle of the child, that could not but call a profound response from Debussy's imagination. But, above all, it was the figure of Mélisande herself that made him pour himself completely into the setting of the play. For that figure permitted Debussy to give himself completely in the creation of his ideal image. The music is all Mélisande, all Debussy's love-woman. It is she that the music reveals from the moment Mélisande rises from among the rocks shrouded in the mystery of her golden hair. It is she the music limns from the very beginning of the work. The entire score is but what a man might feel toward a woman that was his, and yet, like all women, strange and mysterious and unknown to him. The music is like the stripping of some perfect flower, petal upon petal. There are moments when it is all that lies between two people, and is the fullness of their knowledge. It is the perfect sign of an experience.