We usually practice Tai Chi, Qigong or Meditation in order to gain something: more "Qi", more martial prowess, more understanding. But everything that is a kind of "gaining", is in some way reinforcing your Self, bringing dangers and vanity. But, if we look at our Self how it is in reality, meaning a ring in a wider chain, we start to look at our practice from a different perspective, that is indeed really pivotal for a practice to be a "Spiritual" one.