The crooning song of the mother soothes the infant and makes it sleep, and lively music gives it an inclination to dance. It is music which doubles the courage and strength of a soldier when marching towards the field of battle. In the East, when the caravans travel from place to place on a pilgrimage, they sing as they go. In India the coolies sing when at work, and the rhythm of the music makes the hardest labor become easy for them.