A Quote by George Leonard on mastery, 5 keys to mastery, guides, and teachers
What if you're practicing wrong? Then you get very good at doing something wrong. If we don't get good instruction, then we don't notice when it's a little out of round. Surrender yourself to your teacher. That's doesn't mean you turn over your life to the teacher - you don't want a guru. You have to keep the autonomy within yourself. You are finally the ultimate authority on your own practice.
Source: Mastery: The Keys to Success and Long-Term Fullfillment (Plume)
Contributed by: ~C4Chaos