We live in a hungry world. Every creature has an open mouth wanting to be fed. From the baby bird in the nest to the eagle soaring in the sky; from the minnow in the creek to the whale in the ocean; from the mouse nibbling on a crumb to the mighty elephant in jungle; every creature has to be fed. In fact, most creatures in the animal world devote most of their lives to finding food. But physical food only satisfies us temporarily.