We say that the hand is in control, when it can grasp something and hold it in its grasp. The fingers we say are in control, when they move up and down the piano, when they strike B when B is wanted - not striking E. Control is both in repose and in activity. Sometimes we find that we have become angry, we have become impatient, we have lost control over our mind, but before losing control of the mind we had lost control of the breath.