A man sees while going along a road, a ripe fruit on a tree by the side. The mind craves for the fruit, but, that by itself cannot fulfill that craving. The feet take him near the tree, but, that does not bring about the consummation. The trunk stoops, the hand picks up a stone, the shoulders throw the stone at the fruit, and the fruit falls on the ground. But, that does not end the story. The fruit has to be picked up by the fingers, transferred into the mouth, the teeth have to bite into it, and masticate it well, and the tongue has to take charge in order to make it reach the stomach. The eating part of the task is thus over.
But, that does not end the story of the craving for the fruit. Since so many instruments cooperated in the fulfillment, gratitude has to be rendered to each of them. So, the stomach sends strength and satisfaction to every limb that shared in the adventure of securing the fruit and eating it - the eyes, the feet, the hands, the fingers, the shoulder, the tongue, the teeth, the gullet. No one of them is neglected or discriminated against.