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and embedded philosophical premises that later served as foundation for Vedanta school of Hinduism. It is one of the most cited texts in later ''Bhasyas'' (reviews and commentaries) by scholars from the diverse schools of Hinduism. It has gained importance as one Upanishad for which Adi Shankara has cited Chandogya Upanishad 810 times in his ''Vedanta Sutra Bhasya'', more than any other ancient text.  

and embedded philosophical premises that later served as foundation for Vedanta school of Hinduism. It is one of the most cited texts in later ''Bhasyas'' (reviews and commentaries) by scholars from the diverse schools of Hinduism. It has gained importance as one Upanishad for which Adi Shankara has cited Chandogya Upanishad 810 times in his ''Vedanta Sutra Bhasya'', more than any other ancient text.  

== Introduction ==

== परिचय || Introduction ==

The Chandogya Upanishad is slightly smaller in extent than the Brhadaaranyaka Upanishad. Its importance is due to the fact that it directly deals with the true nature of Brahman, the Supreme Self, or Advaita without a second, and its identity with the Individual Self.  This Upanishad though mainly deals with the Science of Non-Duality, yet in it are described the forms of Upasana (meditation and worship) as the means of the attainment of good results; for, these bring about results which are as good as Liberation itself.  There is also a similarity between the Upasana and the knowledge of Non-Duality in that both are esoteric in their character and both fall within the purview of the functions of the Mind. These forms of Upasana purify the inner-sense-organs and thereby become illuminative of the true nature of the reality, and so they are helpful in bringing about the Cognition of the Absolute (अद्वैतज्ञान); and as they (Upasanas) have got some definite substratum as their object (आलम्बनविषय), it is also easier to achieve success in it.   

The Chandogya Upanishad is slightly smaller in extent than the Brhadaaranyaka Upanishad. Its importance is due to the fact that it directly deals with the true nature of Brahman, the Supreme Self, or Advaita without a second, and its identity with the Individual Self.  This Upanishad though mainly deals with the Science of Non-Duality, yet in it are described the forms of Upasana (meditation and worship) as the means of the attainment of good results; for, these bring about results which are as good as Liberation itself.  There is also a similarity between the Upasana and the knowledge of Non-Duality in that both are esoteric in their character and both fall within the purview of the functions of the Mind. These forms of Upasana purify the inner-sense-organs and thereby become illuminative of the true nature of the reality, and so they are helpful in bringing about the Cognition of the Absolute (अद्वैतज्ञान); and as they (Upasanas) have got some definite substratum as their object (आलम्बनविषय), it is also easier to achieve success in it.