"The characteristics of a good musician can be summarized as follows: 1. A well-trained ear. 2. A well-trained intelligence. 3. A well-trained heart. 4. A well-trained hand. All four must develop together, in constant equilibrium. As soon as one lags behind or rushes ahead, there is something wrong. So far most of you have met only the requirement of the fourth point: the training of your fingers has left the rest far behind. You would have achieved the same results more quickly and easily, however, if your training in the other three had kept pace."