। ॥ २३ ॥
In plain words
So for those in whom the conviction has not yet arisen, turning sentences like "You are That" over in thought makes this Self look like something known at second hand — even while it is shining inward, immediate, all along.
Close to the Sanskrit
Thus, for those devoid of (that) conviction, through reflection on sentences such as 'That thou art', this Self appears as if it were beyond sight — though it is shining inwardly, as the immediate.