# Advanced Practices: Doors of Perception

0 Yajnavalkya, which is the light of this person? The light of the sun, 0 king, said he, by the light of the sun indeed, one sits, walks about, does the work and comes back.

So is it indeed, 0 Yajnavalkya.

0 Yajnavalkya, which is the light of this person after the sun has set? The moon indeed becomes the light. By the light of the moon indeed, one sits, walks about, does the work and comes back.

So is it indeed, 0 Yajnavalkya.

0 Yajnavalkya, which is the light of the person when the sun and moon have set? Fire indeed is his light. By the light of the fire indeed one sits, walks about, does the work and comes back.

So is it indeed, 0 Yajnavalkya.

0 Yajnavalkya, which is the light of this person, when the sun and the moon have set and the fire is put out? Speech indeed is his light. By the light of the speech indeed, one sits, walks about, does the work and comes back. Hence, 0 king, even when one’s hand cannot be distinguished, then wherever speech sounds, one can approach there.

So is it indeed, 0 Yajnavalkya.

0 Yajnavalkya, which is the light of this person, when the sun and moon have set, fire has gone out, speech has been hushed? The Self indeed is his light. By the light of the Self indeed, one sits, walks about, does the work and comes back.