Autenticity: "The quality of being real or true" (www.dictionary.cambridge.org).
What do being authentic and acting authentically mean to you?? As I'm working with clients, they frequently ask me things like: "am I doing this movement correctly? How am I doing?" My response is usually this: "what do you think? Why don't you tell how you feel you are doing?" Then, many say "I don't know. You tell me because you are an expert."
Why do you care how you move? How do you know you're moving or sitting incorrectly? Is it because some experts told you so?? No one can feel your body except you. No one can tell whether one movement is comfortable for you or not. Just because one particular movement feels good for one person, that doesn't mean the same movement would feel great for everyone. We are all different and unique.
"The general tendency toward social improvement in our day has led directly to a disregard, rising to neglect, for the human material of which society is built. The fault lies not in the goal itself but in the fact that individuals, rightly or wrongly, tend to identify their self-images with their value to society. Like a man trying to force a square peg into peculiarities by alienating himself from his inherent needs. He strains to fit himself into the round hole that he now actively desires to fill, for if he fails in this, his value will be so diminished in his own eyes as to discourage further initiative." - Moshe Feldenkrais
We tend to act in accordance with our society and act to satisfy society's needs. As we start to do that, we start to lose spontaneity and authenticity. This is why we get so uncomfortable when someone doesn't us how we're doing, whether we're doing things correctly or not. We become anxious because we tend to identify our self-images with our value to society.
This is one of the several reasons why I don't advocate a corrective exercise approach. In my opinion, a corrective exercise approach only reinforces the same mindset and robs authenticity and spontaneity. Next time you exercise or do any movement practice, pay attention to how you feel. Play with movements. Try to move a little differently each time and notice how a slight change in movement changes how your body feels. You will know what feels good or bad. If it feels good, then that's probably a correct movement for you. When you start to move more authentically and naturally, you will start to express yourself more authentically as well. It feels good to be authentic!