After vocal and instrumental music comes the motional music of the dance. Motion is the nature of vibration. Every motion contains within itself a thought and feeling. This art is innate in man. An infant's first pleasure in life is to amuse itself with the movement of hands and feet; a child on hearing music begins to move. Even beasts and birds express their joy in motion. The peacock, proud in the vision of its beauty, displays its vanity in dance; likewise the cobra unfolds its hood and rocks its body on hearing the music of the pungi. All this proves that motion is the sign of life, and when accomplished with music it sets both the performer and onlooker in motion.