Think of the times we say things we regret about other women. Who are we saying these things to? In what context do these feelings arise? And most importantly, what are the underlying feelings driving the negative comment?
The negative thoughts and feelings that are inflicted upon us might also come from inside of us too. While honest self-reflection is healthy and can lead to positive change, it's also important to be kind to ourselves and remember the things we do well.
As my friend so wisely pointed out, who was I to judge what was excellence in my yoga practice? My ego, the judge, was arrogant enough to think it knew better than my body what was right and good for me.