Individuality.
If the artist has studied and learned how to give expression to the individual feeling of the composer, his own individuality in the performance is also of great consequence. It consists in this: that the same piece in performance shall appear ever fresh and new. Individual feeling is subject to continuous change, through influences from within and without, consequently an artist who has acquired a full and active control over all his powers does not perform a piece the second time in precisely the same manner as the first time. Where however, this is the case, it may be regarded as a sign that the performer has not yet arrived at a complete artistic freedom.