The partial translation of the above verse is as follows:
That man who sees actionlessness in action and action in actionlessness, he is intelligent among men.
Here is my interpretation of the meaning of, “Actionlessness in Action and Action in Actionlessness”:
Actionlessness in Action
Any action is done by the three gunas. I am not the doer. I remain actionless irrespective of any action.
Action in Actionlessness