Ramana MaharshiDesire makes even an atom appear as great as Mount Meru before it is achieved, and vice versa after it is achieved, and thus [desire] makes one always poor. Hence we have never seen any bottomless abyss that is as impossible to fill as desire, which can never be satisfied.

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