The Cha’ndogya Upanishad and Sri Sankara’s Commentary

On account of the identity of the doctrine of these and of the similarity consisting in the fact of both of these belonging to the function of the mind that is to say. [...] “ What then is the difference between the meditations and the knoledge of non-duality ?” We explain : The knOWledge of non-duality is that which removes the idea of the difference among the doer the deed and the result &c. [...] 11 *k II The essence of all these beings is the earth ; the essence of the earth is water; the essence of water plants; the essence of plants man ;' the'essence of man speech ; the essence of speech la; the essence of Rik Seimo ; the essence of Sawa is the wiffithii. [...] Self; and hence the worship of that (syllable) is the worship of the supreme Self;—as declared in the smriti "Having worshipped Him by means of actions man attains sucess." " By greatness and essence": It is by means of the greatness of this syllable the greatness consisting of the breaths of the Ritvic ' the Yajamdna and the rest — and by the essence of this syllable the essence consisi [...] the function of the air in between these two--is " What is known as " Vyaaa " in the systems of Sitrikhya and Yoga (according to which Vyáita ' is the name of the air located in the shoulders) is not real Vytiaa ; inasmuch as the Sruti specifies it (as the function in between Pi.ecita and Apaaal—such is the meaning of the passage.