I also say with backbends, you have to be cautiously bold. Not carelessly bold. You have to descend to the dictation of the spine. You cannot command from the brain to do the poses. As you play with a child, guarding the child from injuries, similarly you have to play in backbends, guarding your spine.
B.K.S. IyengarMy Maman told me that only the crazy ones and the passionate ones accomplish anything in life.
B.K.S. IyengarA stable mind is like the hub of a wheel. The world may spin around you, but the mind is steady.
B.K.S. Iyengar