Arjuna surveys the battlefield, collapses in grief at the prospect of killing his kinsmen, and Krishna responds with the foundational teaching: the soul is eternal, the body is temporary, and grief for the immortal is irrational.

Krishna teaches that action is inescapable and that selfless action — performed as sacrifice without attachment to results — is superior to both inaction and renunciation of the world.

Krishna reconciles action and renunciation, teaching that true renunciation is internal — abandoning attachment, not activity. He then describes the practice of meditation and the qualities of the disciplined yogi.

Krishna reveals his divine nature — both immanent in creation and transcending it — and then manifests his terrifying Universal Form (Vishvarupa), showing Arjuna the totality of existence, including the destruction of all warriors on the battlefield.

Krishna teaches that loving devotion (bhakti) is the most direct and accessible path to liberation, open to all regardless of caste, gender, or learning. Even a leaf, a flower, or water offered with devotion is accepted by God.

Krishna explains the distinction between the body ('the field') and the soul ('the knower of the field'), describes how the three fundamental qualities of nature — sattva, rajas, and tamas — bind the soul to material existence, and uses the metaphor of the inverted cosmic tree to map the structure of reality.

Krishna distinguishes between divine and demonic temperaments, explains how the three gunas shape faith and practice, and warns against austerity performed for show rather than genuine spiritual growth.

Krishna synthesizes all prior teachings, explains the dynamics of action through the three gunas, reveals the ultimate instruction — complete surrender to the divine — and Arjuna declares his delusion destroyed. He will fight.