Traditional Chinese Medicine--CHI is the Energy that flows through us all. Many believe in this Energy, some do not such as modern science. Traditional Chinese Medicine are proponents of this Chi, which is used in Acupuncture, Acupressure and many Massage traditions. Both ancient and modern.
Why is Chi Kung so powerful? By doing the movements properly you are both practicing the presence of the eternal force as well as practicing the present moment. By constantly giving it recognition, you will bring it to life and will actually start to feel its presence.