In the sphere of piano performance or piano artistry there are few human activities where the necessity for extraordinary physical prowess is so closely aligned with the greatest intellectual and emotional capacities.

The virtuoso must possess a memory capable of maintaining thousands of pages of music in the mind and fingers, under the stress and distractions of public performance; the virtuoso must be cultured and self-aware, musically able to convey the great range of meaning embodied within a chosen repertoire; the virtuoso must project both physical excitement and emotional communication; and the virtuoso must experience life to the fullest while remaining cloistered with an instrument in a relentless quest to maintain his or her craft at its highest level.

http://www.theartofpianoperformance.com/