Master : What is the light for you?
Disciple : For me by day (it is) the sun, by night, a lamp.
M : What is the light that perceives that light?
D : The eye.
M : What is the light that illumines the eye?
D : That light is the intellect.
M : What is the light that knows the intellect?
D : It is the « I ».
M : You are (therefore) the supreme light of (all) lights.
D : That truly am i.