The source of all light is in the eye. If there were no eyes in this world, the sun would not be light. So if I hit as hard as I can on a drum which has no skin, it makes no noise. So if a sun shines on a world with no eyes, it's like a hand beating on a skinless drum. No light. YOU evoke light out of the universe, in the same way you, by nature of having a soft skin, evoke hardness out of wood. Wood is only hard in relation to a soft skin. It's your eardrum that evokes noise out of the air. You, by being this organism, call into being this whole universe of light and color and hardness and heaviness and everything.