from Abby Whiteside:

Power must be so snug that it chokes out of the fingers.

Faulty coordination always involves overactivity in articulation.

Most technical difficulties which persist are the result of reaching with the fingers for key position. This reaching with the fingers practically insures that the fingers will act independently of the arm – they will get there first; and when they do they furnish the power for tone. Then it is that no feeling of complete efficiency in playing ever appears. Fingers have been publicized as the all-efficient tool for playing. They should be publicized as simply the periphery of the playing mechanism.