Earth is the substantial essence of all these creatures and the waters are the essence of earth; herbs of the field are the essence of the waters, man is the essence of the herbs. Speech is the essence of man, Rig-veda the essence of Speech, Sama the essence of Rik. Of Sama OM is the essence.
Speech is Rik, Breath is Sama; the Imperishable is OM of Udgitha. These are the divine lovers. Speech and Breath, Rik and Sama.
=Importance of Control of Speech=