…while speaking, letting go, grasping, even opening and closing the eyes, he holds the understanding that it is only the senses moving among the objects of the senses.
Explanation
Krishna finishes the sentence begun in the previous verse. The disciplined knower of truth (yukta tattvavit) does not think "I am the doer", even in ordinary acts such as speaking, grasping or blinking. He sees them as the senses (indriya) working among their objects (indriyārtha). Commentators differ on whether this describes a person established in the Self's inaction, or a practical attitude of detachment that a karma yogi can grow into.