You must do the asana with your soul. How can you do an asana with your soul? We can only do it with the organ of the body that is closest to the soul - the heart. So a virtuous asana is done from the heart and not from the head. Then you are not just doing it, but you are in it. Many people try to think their way into an asana, but you must instead feel your way into it through love and devotion
B.K.S. IyengarA scientist sets out to conquer nature through knowledge - external nature, external knowledge. By these means he may split the atom and achieve external power. A yogi sets out to explore his own internal nature, to penetrate the atom (atma) of being. He does not gain dominion over wide lands and restless seas, but over his own recalcitrant flesh and febrile mind.
B.K.S. IyengarAs long as the body is not in perfect health, you think about it, and that prevents you from thinking of the mind. The sound mind is a sound body.
B.K.S. IyengarFor me there were only two ways on the precipice - either I have to fall in or I have to fall out, to accept or say good-bye. The moment I crossed the precipice, it no longer was a discipline - it became a passion, an urge to pursue. Then I experienced freedom. Freedom comes when the discipline revolutionizes the discipline as a passion for the art.
B.K.S. Iyengar