A performer cannot move others unless he is also moved. He must feel all of the affects he hopes to arouse in his audience.
A mere technician can lay no claim to the rewards of those who sway the heart rather than the ear … one meets technicians who astound us with their prowess, without ever touching our sensibilities. They overwhelm our hearing without satisfying it, and stun the mind without moving it.
|– C P E Bach, quoted in Early Music|