Backbends are to be felt more than expressed. The other postures can be expressed and then felt. Like in meditation each person has to feel backbends.
B.K.S. IyengarThe light that Yoga sheds on life is something special. It is transformative. It does not just change the way we see things; it transforms the person who sees.
B.K.S. IyengarThrough surrender the aspirant's ego is effaced, and . . . grace . . . pours down upon him like a torrential rain.
B.K.S. Iyengar