Ask the animals and they will teach you, or the birds of the air and they will tell you; or speak to the earth and it will teach you, or let the fish of the sea inform you. Which of these does not know the hand of God?
~ Job 12:7-9
We cannot know that we are illuminated by a great light simply by looking up into the sky. But if we lower our heads and look down at our feet, we can clearly see the long, dark shadow that stretches out from us. We know that the darker and blacker that shadow is, the brighter is the light that shines upon us. Thus, we have been told to look at our own dark shadows [within].