ज्ञानेन तु तदज्ञानं येषां नाशितमात्मनः।तेषामादित्यवज्ज्ञानं प्रकाशयति तत्परम्॥
jñānena tu tad ajñānaṃ yeṣāṃ nāśitam ātmanaḥteṣām āditya-vaj jñānaṃ prakāśayati tat param
Word by word
The verse says
But for those whose not-knowing has been destroyed by knowing the self, their knowing lights up that highest thing, the way the sun does.
In plain words
The answer to the covering described in the last verse.
Nothing is added. Something is removed, and what was always there shows.
The sun is not a light being switched on. It is what is there when the cloud goes.
Where you've felt this · in study
You spend three weeks baffled by a subject, and then one sentence from a friend puts it right. Nothing new was added to the page. The same paragraph you could not read on Monday reads perfectly well on Thursday.
Going deeper
The sun is chosen carefully, and the reason is in what a sun does not do.
A lamp is brought in. A sun is already there, and the change at dawn is not that light has been manufactured but that nothing is in the way any more.
That fits the diagnosis at 5.15 exactly. The problem was never absence; it was covering. So the fix cannot be acquisition, and this verse does not describe one.
Which is quietly encouraging for anyone who has read four chapters wondering how much of this they have to build. On this account, none of it. The work is subtraction.
And there is a test in the image. Something acquired can be lost track of. Something uncovered stays uncovered, the way a subject you finally understood does not go back to being opaque.