Backbends are not poses meant for expressionism. Backbends are meant to understand the back parts of our bodies. The front body can be seen with the eyes, but the back body can only be felt. That's why I say these are the most advanced postures, where the mind begins to look at the back.
B.K.S. IyengarIn Savasana or in meditation, the light of the eyes is drawn towards the lotus of the heart, so that the seat of the intelligence of the head is brought into contact with the seat of the intelligence of the heart, which is called the mind. Thus one passes from the individualistic state of consciousness to the universal state of consciousness. It is the merging of the intellect of the brain with the intellect of the soul.
B.K.S. IyengarPeople say that steadiness of mind is an end; no, it is a beginning. I am there; I can explain everything up to that point. Then I struggle to discover what comes after, so this steadiness is not an end, it is the beginning and the instrument.
B.K.S. IyengarPractice doing yoga with an innocent mind. Then, you will be able to cognize the things happening in your body
B.K.S. Iyengar