I have never questioned the importance of melody. I love melody, and I regard it as the most important element in music. I have worked on the improvement of its quality in my compositions for many years. To find a melody instantly understandable even to the uninitiated listener, and at the same time an original one, is the most difficult task for a composer. Here he is beset by a great multitude of dangers: he may fall into the trivial or the banal, or into the rehashing of something already written by him. In this respect, composition of complex melodies is much easier. It may also happen that a composer, fussing over his melody for a long time, and revising it, unwittingly makes it over-refined and complicated, and departs from simplicity. Undoubtedly, I fell into this trap, too, in the process of my work. One must be particularly vigilant to make sure that the melody retains its simplicity without becoming cheap, saccharine, or initiative. It is easy to say, but not so easy to accomplish. All my efforts will be henceforth concentrated to make these words not only a recipe, but to carry them out in my subsequent works.
I must admit that I, too, have indulged in atonality, but I also must say that I have felt an attraction towards tonal music for a considerable time, after I clearly realized that the construction of a musical work tonally is like erecting a building on a solid foundation, while a construction without tonality is like building on sand.N. Slonimsky & L. Kuhn (ed.), Music Since 1900, New York, Shirmer, 2001, p. 950.
— Sergei Prokofiev, in a letter to the General Assembly of Soviet Composers, 1948