By analogy God is to Christians as the sun is to the moon. As the sun is the exclusive source of light, so God is the sole source of glory; as the moon reflects light, so believers reflect God's glory. Because God's image in man was fractured by the fall, sinful humans refract God's glory more than they reflect it back to Him. But once believers begin to be transformed into the same image at the moment of salvation, they reflect more than they refract. Thus, God's glory is more and more returned to Him just as He transmitted it to his beloved ones. That's how Christians can give to God something that He alone possesses and shares with no one (Isa. 42:8; 48:11).