Ramana MaharshiYour duty is to be and not to be this or that. 'I am that I am' sums up the whole truth. The method is summed up in the words 'Be still'. What does stillness mean? It means destroy yourself. Because any form or shape is the cause of trouble. Give up the notion that 'I am so and so'.

Ramana Maharshi

Chāndogya Upaniṣad Reference Materials:

Video/Audio Lectures

Swami Paramarthananda
77 classes (~55 mins each) 1, 2, 3, 4, 5, 6, 7, 8

Swami Brahmarupananda
2 talks (~55 mins each)

Swami Viditatmananda
359 classes (~75 mins each)

02 Chhandogya Upanishad

Swami Krishnananda
21 classes (~50 mins each)

Neema Majmudar
28 classes (~90 mins each)

Rishikesh Retreat of Chandogya Upanishad class 1 part 1 by Neema Majmudar