Connecting to the Universe
Humans are made of, powered by, and emit energy. This energy, the aura, is an electromagnetic field that surrounds the body. The intensity and frequency the aura emits is affected by change of emotion, use of muscles (such as during Tai Chi) and state of mind.
Through meditation, deep reflection and self-awareness, a person can become conscious of the feel of their energy, what chakra is being drawn on, and eventually how external energies feel against the aura.