Sri M said..

All these activities like blood circulation and so on are not under our control, breathing too. We don’t say, ‘Breathe!’ And therefore the lungs breathe. It goes on by itself. But we can also voluntarily control it to an extent, not breathe for a few moments or breathe slowly and so on. That is one activity which we have some control over. Therefore it is a direct link to that which controls all our activities.