। ॥ ८७ ॥
In plain words
So this is the right conclusion: what the word "I" actually points to is the supreme Ātman alone, the witness of everything, with nothing outside its seeing. This ego is jaḍa — inert, with no awareness of its own. It looks conscious only because it stands next to sat, to Being itself, and borrows the light.
Close to the Sanskrit
Therefore it is fitting that the supreme Self alone, the witness of all without remainder, is the referent of 'I'. This ego, insentient, becomes exactly as though sentient through its connection with Being.