This is from a Yoga Journal article I read a long time ago. I apologize to the author as I did not write that down. (Very unlike me. I do like to give credit to good things.) Many people asked for this after I shared it in class and so I put it here and on FaceBook. Enjoy!
The discipline that comes from mastering the foundation of your poses with precision will create the freedom you need in your body to explore your edges.
Precision is different that perfectionism:
Working precisely requires mindfulness of action
Perfectionism is rife with self-criticism and judgement (the never ending plateau of self-doubt)
Precision is about process
Perfectionism occurs when you believe the myth that there is an endpoint to your practice.