Chapter 2: The Eternal Reality of the Souls Immortality
Krishna inquires Arjuna the reason for his sudden weakness and the reason for his belief of a physical body as an ultimate part of the Universe. He explains that, while body is destructible, soul is never destroyed and it continues a new life once it is released from its current body. He, hence, tells him to not consider the physical bodies of his foes as they themselves and encourages him to fight. He stresses that one should only perform his duty and not expect anything from its outcome. He also mentions that a wise man should consider both victory and loss as equal. The same, also, applies to happiness and sadness. He does not get attached to wordly happiness and finds happiness within himself. Hence, not even any human feelings affects him. He encourages Arjuna to be such a person and gain spiritual intelligence.
This is the summary of the second chapter of Bhagavad Gita.
Have a good one! 🙂