The Emotions in Piano Playing
"However, not until man invents a living soul, can piano playing by machine include the third and vastly important channel through which we communicate the works of the masters to those who would hear them. That channel is the emotional or artistic phase of piano playing. It is the channel which the student must expect to develop largely through his own inborn artistic sense and his cultivated powers of observation of the playing of master pianists. It is the sacred fire communicated from one art generation to the next and modified by the individual emotions of the performer himself.
"Even though the performer may possess the most highly perfected mechanism, technical mastery which enables him to play great masterpieces effectively, if he does not possess the emotional insight, his performances will lack a peculiar subtlety and artistic power that will deprive him of becoming a truly great pianist.