Picture someone who has given up all claim to the harvest but still tends the garden every morning — watering, weeding, pruning — simply because the work itself is enough. That is the person Krishna describes. Having dropped attachment to results, always satisfied within, depending on nothing outside, fully engaged in action yet doing nothing at all.
The paradox is deliberate. The body works, the hands move, duties are fulfilled. But inside, there is no grasping. Wind carries clouds across the sky without holding any of them. This is the maturity of nishkama karma yoga — working without wanting.