"It must not be just your mind or even your body that ist doing the asana. You must be in it. You must do your asana with your soul.
How can you do asana with your soul? We can only do it with the organ of our body that is closest to the soul - our heart. So a virtuous asana ist 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 Iyengar; Bildquelle: www.iyogaposes.com)