this symbol is multi-dimensional, made-up of three sevens on a flat surface.  Three sevens represent the seven chakras, the seven colors and the seven tones of the musical scale.  It appears as a 3-dimensional cube.  Its energy moves from two to three dimensions all the way to the highest dimension - the dimension of the higher self.  When meditating with this symbol, it automatically creates the Microcosmic Orbit, sending Ki through the central energy channels and the body.  Psychic energies normally enters the Crown Chakra, the Antahkarana enters the feet and travels up the back of the body to the top of the head down the front to the feet again, grounding the person to the Earth and creating continous flow of energy through the chakras.