The work opens on the plain of Kurukshetra, where Prince Arjuna is paralyzed by moral dread at the prospect of fighting his own kinsmen in the impending civil war. Refusing to raise his bow, he turns to his charioteer, Krishna, for guidance on what constitutes righteous action versus fatal sin. Krishna responds with sweeping metaphysical instruction, gently dismantling Arjuna's grief by explaining the immortality of the soul, which merely sheds worn-out flesh like clothing and remains untouched by death or destruction.
As the dialogue deepens, Krishna outlines the various paths of spiritual realization, bridging the apparent divide between passive meditation and active duty. He argues that one must act without attachment to the fruits of labor, treating success and failure with total equanimity. By performing necessary duties as an offering to the divine while relinquishing ego and desire, a person can achieve true freedom from the binding chain of karma and attain inner peace.
Throughout the central sections, Krishna gradually reveals his cosmic identity as the supreme creator and sustainer of the universe, the imperishable source from which all physical and spiritual phenomena emerge. To illustrate this vast truth, he grants Arjuna a breathtaking vision of his universal form, displaying the infinite splendour, terror, and consuming power of time itself. Overwhelmed by this divine revelation, Arjuna begs to see his gentle guide once more in human likeness.
The final chapters dissect the three qualities of nature—purity, passion, and ignorance—and how they shape human faith, diet, worship, and intellect. Krishna classifies different types of actions, renunciation, and knowledge, emphasizing that true devotion and total surrender to the divine supersede rigid rituals. Ultimately, Arjuna's doubts are completely dispelled, and he resolves to fulfill his warrior's duty with a steady mind and a tranquil heart.