The Chinese believe that human beings have two kinds of minds. One is called Yi and the other one is called Xin. Yi is steady like a horse and represents wisdom. Xin is like a monkey and represents the emotional mind. To calm down the emotional mind, you should focus on your breathing.
The semi-sleeping state is very important for meditation. Once we get to the semi-sleeping state the subconscious mind starts to wake up. The control of the conscious mind gets thinner and thinner. Once you meditate for a while, you might experience the surfacing of emotions such as anger or sorrow. Those feelings are most likely trapped emotions from the past, and you should release them. Click to learn how Chinese medicine treats Gastroesophageal Reflux Disease (GERD).
Despite this, the semi-sleeping state is a condition in which we can best concentrate. When we are in the conscious state, our mind registers a lot of things and gets distracted by the outside world. Once we reach the semi-sleeping state, those distractions from outside fade away. Of course it is not easy to keep the semi-sleeping state without falling into the sleeping state. Through regular practice you will be able to do so.