In the Mahabharata, one of the most important events occurs in the dramatic setting of a war about to begin. This event is the revelation of the Bhagavad-gita.

Explanation:
Background:
The Mahabharata is an ancient Indian epic that tells the story of the Kurukshetra War between two factions of a royal family, the Pandavas and the Kauravas. The war is a result of a long-standing feud between the two families and is about to begin.

The Bhagavad-gita:
The Bhagavad-gita is a sacred text that is part of the Mahabharata. It is a conversation between Prince Arjuna, one of the Pandava brothers, and Lord Krishna, who is his charioteer. The conversation takes place on the battlefield just before the war is about to start.

Key Points:
- Arjuna is overcome with doubt and moral dilemma as he sees his relatives, including his own cousins and beloved teacher, standing on the opposite side of the battlefield, ready to fight.
- Arjuna is filled with compassion and questions the righteousness of the war and the killing of his own kin.
- Lord Krishna, who is an incarnation of Lord Vishnu, provides guidance and philosophical teachings to Arjuna in the form of the Bhagavad-gita.
- Krishna explains the concepts of duty, righteousness, and the nature of the soul.
- He emphasizes the importance of performing one's duty without attachment to the results and the immortality of the soul.
- Krishna reveals his divine form to Arjuna and reassures him of his support and guidance.
- Arjuna gains clarity and understanding from Krishna's teachings and his doubts are dispelled.
- He is ready to fight the war with a renewed sense of purpose and determination.

Significance:
The revelation of the Bhagavad-gita in the Mahabharata is a pivotal moment as it provides profound philosophical and moral teachings. It explores complex themes of duty, devotion, and the nature of reality. The Bhagavad-gita is considered a guide to living a righteous life and has had a profound impact on Hindu philosophy and spirituality. It continues to be studied and revered by millions of people around the world.