-Ekashloki by Adi Shankaracharya

 G: What is your source of light?

D: During the day it is the sun and at night, it is lamp, etc.

G: Yes, it is. Tell me, what light is the means of seeing the sun and the lamp

D: It is the eye.

G: At the time of shutting the eyes, etc., what is the light?

D: It is intellect.

G: What is the source of light for the intellect?

D: It is “I”, the Self (Awareness)

G: Therefore, your own Self (Awareness) is the light of lights (or the Supreme light).

D: Yes, O Lord, I am That Supreme Light (Awareness)