Talk 259.
Nada, Bindu and Kala [?] correspond to prana, mind and intellect. Isvara [?] is beyond nada [?] (sound). Nada, jyoti (light), etc., are mentioned in Yoga literature. But God is beyond these.The circulation of blood, respiration of air, and other functions of the body are bound to produce sound. That sound is involuntary and continuous. That is nada.