अरुणेनेव बोधेन पूर्वं सन्तमसे हृते ।तत आविर्भवेदात्मा स्वयमेवांशुमानिव ॥ ४३ ॥
In plain words
First, knowledge dawns like the first red light before sunrise, and the darkness breaks. Then the Self simply shines out on its own — the way the sun does, needing nothing else to make it shine.
Close to the Sanskrit
When, by knowledge — like the [red glow of] dawn — the darkness has first been dispelled, then the Self shines forth of itself, just like the sun.