The body is your temple. Keep it pure and clean for the soul to reside in.
Yoga is firstly for individual growth, but through individual growth, society and community develop.
There must be relaxation in full extension.
The ribs are the wings of the body. Open your wings.
When the mind is controlled and still what remains is the soul
Yes, flexibility of body and physical perfection for Yogasana is important. However more important is the state of your mind, Meditative mind. Your flexibility might be excellent but if your mind is not attentive, you are merely doing some physical exercise, not Yoga.