Continued from Verse Sixteen
17. To those who have not realized the Self, as well as to those who have, the word 'I' refers to the body, but with this difference, that for those who have not realized, the 'I' is confined to the body whereas for those who have realized the Self within the body the 'I' shines as the limitless Self.
Commentary: For those who have not realized the Self, the I is basically founded in the body (which includes the mind) and its attachments and linkages. For those who have, so to say, realized the Self, the I is not grounded in the body. The body is seen as merely a mirror for something which is not actually in the body — any more than the Sun reflected in a puddle is actually in the puddle. The I can refer to the body, as a convenient way of naming a limited entity. But that limited entity is seen as nothing other than a reflection of the Self, which has no limits.
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