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. IyengarThrough surrender the aspirant's ego is effaced, and . . . grace . . . pours down upon him like a torrential rain.
B.K.S. IyengarBy drawing our senses of perception inward, we are able to experience the control, silence, and quietness of the mind.
B.K.S. IyengarYou must fill every inch of your body with the asana from your chest and arms and legs to the tips of your fingers and toes so that the asana radiates from the core of your body and fills the entire diameter and circumference of your limbs. You must feel your intelligence, your awareness, and your consciousness in every inch of your body.
B.K.S. IyengarThe battle of yoga is with the body and with the ego. You must conquer your ego, or small self, so that you can let your soul, your big Self, be victorious.
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. Iyengar