Here is the key. Krishna creates the entire cosmos, dissolves it, and creates it again — yet none of this binds him. He sits 'udasinavat' — as though uninvolved. No attachment, no ego, no claim on the outcome.
This is precisely the state Krishna has been urging Arjuna to adopt since Chapter 3: act fully, but do not cling to the result. The difference is that Krishna does not need to practise this. It is his natural state. He is not pretending to be detached — he simply is.
A river carries boats, logs, and leaves downstream. It does the work of carrying, yet it never grasps any of them. Krishna's action flows the same way — total involvement, zero clinging.