The second chapter of the Bhagavad Gita is Sankhya Yoga. This is the most important chapter of the Bhagavad Gita as Lord Krishna condenses the teachings of the entire Gita in this chapter. This chapter is the essence of the entire Gita. Sankhya Yoga can be categorized into 4 main topics - 1. Arjuna completely surrenders himself to Lord Krishna and accepts his position as a disciple and Krishna as his Guru. He requests Krishna to guide him on how to dismiss his sorrow. 2. Explanation of the main cause of all grief, which is ignorance of the true nature of Self. 3. Karma Yoga - the discipline of selfless action without being attached to its fruits. 4. Description of a Perfect Man - One whose mind is steady and one-pointed.
It is said that This is unmanifest; This is inconceivable; This is unchangeable. Therefore, having known This thus, you ought not to grieve.OPEN VERSE
On the other hand, if you think this One is born continually or dies constantly, even then, O mighty-armed one, you ought not to grieve thus.OPEN VERSE
For death of anyone born is certain, and of the dead (re-) birth is a certainly. Therefore, you ought not to grieve over an inevitable fact.OPEN VERSE
O descendant of Bharata, all beings remain unmanifest in the beginning; they become manifest in the middle. After death, they certainly become unmanifest. What lamentation can there be with regard to them?OPEN VERSE
Someone visualizes It as a wonder; and similarly indeed, someone else talks of It as a wonder; and someone else hears of It as a wonder. And someone else, indeed, does not realize It even after hearing about It.OPEN VERSE