What we are called upon to explain then in the attraction for musical art is essentially the motives which drive man to the creation, appreciation, and performance of music. One of these motives is the love of knowledge as a thing in itself, the understanding of what is, and the power of passing from vantage ground to vantage ground in the logical creation, appreciation, and execution of art forms. _Musical knowledge._ This love of music for its cognitive value can be traced from the earliest musical achievements, as in the growing acquaintance with song, sight reading, qualifications for participation in music, and appreciation of art forms, throughout all stages in the musical development of the individual up to that of the highest interpreters and creators of music. While music is a play on our feelings and appeals primarily to our emotional life, an intellectual mastery of the process, the ability to understand artistic meanings, the ability to construct beautiful art forms, the ability to analyze elements in the power of music, the ability to see the relation between musical art and other forms of art, and the ability to comprehend the unity of all the arts, are basic in our love of music. Even in the cool and logical pursuit of the science of music, foundations are laid for the deepening of insight and the revelation of artistic values. Glimpses into the vistas of unexplored resources intensify the admiration, the feeling of awe, the glimpse into the infinite which is love of the object pursued. The role of intelligence in music is well illustrated in recent experiments in which vocabulary was measured in three groups; namely, ten nationally well-known composers, ten of the most successful students in a large class in composition, and ten of the least successful students in the same class. It was found that the master composers and the successful students of composition ranked in or near the top in a test of general vocabulary; whereas, the unsuccessful students ranked near the bottom. Since knowledge of words is an index for the possession of ideas, it is significant to note that successful composers are persons who have a large and discriminating command of ideas.