We have now to deal with the exercises in Prânâyâma. We have seen that the first step, according to the Yogis, is to control the motion of the lungs. What we want to do is to feel the finer motions that are going on in the body. Our minds have become externalised, and have lost sight of the fine motions inside. If we can begin to feel them, we can begin to control them. These nerve currents go on all over the body, bringing life and vitality to every muscle, but we do not feel them. The Yogi says we can learn to do so. How? By taking up and controlling the motion of the lungs; when we have done that for a sufficient length of time, we shall be able to control the finer motions.