अथ चक्षुरत्यवहत् ; तद्यदा मृत्युमत्यमुच्यत स आदित्योऽभवत् ; सोऽसावादित्यः परेण मृत्युमतिक्रान्तस्तपति ॥
In plain words
Next, the eye reached beyond; when it was freed from death, it became the sun. That very sun in the heavens shines forth, having left death far behind.
Close to the Sanskrit
Now the eye carried [itself] beyond; when that was freed from death, it became the sun; that yonder sun shines, having transcended death.