"Experiencing “light” is easy, even for beginners, during chinkon. One may experience the inside of the brain filled with dazzling light, or one may feel enveloped by a golden mist. But these are only preliminary states of consciousness. If you keep advancing from there by imagining a small sun or a round moon at the center of your forehead, eventually you will see a sun or moon of such brightness that you will be shocked. This does not appear as part of the realm of fantasy, but as the real experience it is. According to the hidden teaching handed down to the Yamakage family, people will see “mist, smoke, sun, wind, fire, fluorescence, crystal, and a moon.” Sometimes a coal black experience may occur instead of light."