The first chapter of the Bhagavad Gita is called Arjuna Bisharada Yoga. The name means 'depression yoga' and it's a spiritual path, not downward dog. Unappiness in itself is not a spiritual thing but can be transformed into spirituality.
Swami Sarvapriyananda teaches Chapter 2 (Verse 1-10) of the Bhagavad Gita. This series of talks unfolds the highest truths of Vedanta through the study of "The Song of God".