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    अहं साक्षीति यो विद्याद्विविच्यैवं पुनः पुनः । स एव मुक्तः सो विद्वानिति वेदान्तडिण्डिमः ॥ १८॥

    He who realizes after repeated contemplation that he is a mere witness, he alone is liberated. He is the enlightened one. This is proclaimed by Vedanta