The theme of the Mandukya Upanishad is an exposition of the Mystic Syllable, Om, with a view to training the mind in meditation, for the purpose of achieving freedom, gradually, so that the individual soul is attuned to the Ultimate Reality.

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Mandukya Upanishad With Gaudapada's Karika and Shankara's Commentary - Swami Nikhilananda

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