"I do not believe that any artist is truly a master of his instrument
unless his control of it is an integral part of a whole. The musician is
born--his medium of expression is often a matter of accident. I believe
one may be intended for an artist prenatally; but whether violinist,
'cellist or pianist is partly a matter of circumstance. Violin mastery,
to my mind, still falls short of perfection, in spite of the completest
technical and musical equipment, if the artist thinks only of the
instrument he plays. After all, it is just a single medium of
expression. The true musician is an artist with a special instrument.
And every real artist has the feeling for other forms and mediums of
expression if he is truly a master of his own.