The necessity of effective control of fingers as an essential part of good, sensitive piano performance cannot be overstated. But it is not merely a matter of exercising the fingers to make them facile, and isolated finger drill will not as such produce sensitive performers. Rather, it is a process of gaining control so that the fingers can respond in the proper manner at any moment to produce whatever musical effects or sounds are indicated by the symbols on the page of music. Therefore good piano technique should not only enable one to sightread better, and learn pieces more quickly, but it should also enable the performer to play more musically.
~ Excerpt From FINGER BUILDERS 1, Foreword