I had been told to try to exactly copy my teacher to the best of my
ability, and that no matter how hard I would try to duplicate my
teacher's playing, my own performance would inevitably differ,
simply because no two people are alike.  Even strictly keeping in
mind the goal, trying to reproduce my teacher's sound, the end
result, over a 30 or 40 year period, would be the subtle
transformation of that tradition.
	- Ronnie Nyogetsu Seldin (Hogaku, Vo. 1:1, p122-123)