Karma Yoga is the Bhagavad Gita's answer to the perennial question of how to live in the world without being crushed by it. Krishna teaches Arjuna — and, through him, every seeker — that action itself is not the problem; attachment to its fruits is. The path of Karma Yoga replaces the calculation of gain and loss with the discipline of offering, so that work becomes worship and duty becomes liberation.
The teaching unfolds most fully in Chapters 2, 3, 4, 5, and 6. Chapter 2 introduces the seed idea in the Gita's most quoted verse (2.47): you have a right to your action, but never to its fruits. Chapter 3 develops the theme into a social vision — inaction is impossible for an embodied being, and even the enlightened must act to sustain the world. Chapter 4 links Karma Yoga to knowledge: the wise see inaction in action and action in inaction. Chapter 5 dissolves the false opposition between renunciation and work, and Chapter 6 grounds the whole practice in meditative steadiness.
What makes Karma Yoga distinctive is its refusal to make spirituality a retreat from ordinary life. Krishna is not asking Arjuna to leave the battlefield; he is asking him to remain on it, fully engaged, but inwardly free. The result is a working philosophy for householders, professionals, parents, and warriors alike — one that has shaped everything from Vivekananda's activism to Gandhi's satyagraha to the modern discourse on mindful work.
Read these verses together to see how the doctrine builds — from the metaphysical foundation of the deathless Self, to the practical injunction to act without craving, to the mystical culmination in which the actor, the action, and the fruit are all offered into the fire of Brahman.