The light of the world comes and goes, it is unstable. The Light that is eternal can never be extinguished. By this Light you behold the outer light and everything in the universe; it is only because It shines ever within you, that you can perceive the outer light. Whatever appears to you in the universe is due solely to that great Light within you, and only because the Supreme Knowledge of the essence of things lies hidden in the depths of your being is it possible for you to acquire knowledge of any kind.