Krishna introduces a vivid image. The self-controlled embodied soul mentally renounces all actions and rests happily in the nine-gated city — the body. Neither acting, nor causing others to act.
The body has nine gates: two eyes, two ears, two nostrils, the mouth, and two lower openings. This is our city. Whoever becomes the true master of this city — whoever mentally surrenders all action to God — lives in this very body with contentment and ease.