Now what is the true, that is the Aditya (the sun), the person that dwells in yonder orb, and the person in the right eye. These two rest on each other, the former resting with his rays in the latter, the latter with his pranas (senses) in the former. When the latter is on the point of departing this life, he sees that orb as white only, and those rays (of the sun) do not return to him.

In plain words: The truth is the sun, the being who lives in the sun, and the being in a person's right eye. They support each other: the sun shines its rays into the eye, and the eye's senses reach out to the sun. When a person is about to die, he sees the sun as plain white, and its rays no longer come back to him.