Asana is perfect firmness of body, steadiness of intelligence, and benevolence of spirit.
B.K.S. IyengarThere is no progress toward ultimate freedom without transformation, and this is the key issue in all lives.
B.K.S. IyengarAsanas maintain the strength and health of the body, without which little progress can be made. Asanas keep the body in harmony with nature
B.K.S. IyengarDo not allow past experiences to be imprinted on your mind. Perform asanas each time with a fresh mind and with a fresh approach. If you are repeating what you did before, you are living in the memory, so you are living in the past. That means you don't want to proceed beyond the experience of the past. Retaining that memory is saying, 'Yesterday I did it like that.' When I ask, 'Is there anything new from what I did yesterday?' then there is progress. Am I going forward or am I going backward? Then you understand how to create dynamism in a static asana.
B.K.S. Iyengar