ईशजीवात्मवद्भाति यथैकमपि ताम्रकम् ।एकोऽप्यात्मा तथैवायमीशजीवादिवन्मृषा ॥ ६६ ॥
In plain words
One copper can take on many names and forms without ceasing to be copper. In the same way, the one Self seems divided into Īśvara, jīva and other distinctions, though the division itself is only an appearance.
Close to the Sanskrit
Just as one substance of copper may appear in forms distinguished as though they were different entities, so this one Self falsely appears as Īśvara, jīva and the like.