Sakalya said: 'Whosoever knows that person whose dwelling are (bright) colours, whose sight is the eye, whose mind is light,—the principle of every self, he indeed is a teacher, O Yagnavalkya.' Yagnavalkya replied: 'I know that person, the principle of every self, of whom thou speakest. The person in the looking-glass, "he is he." But tell me, Sakalya, who is his devata?' Sakalya replied: 'Vital breath' (asu).

In plain words: Sakalya asks about the being whose home is bright colours and whose sense is the eye. Yagnavalkya says it is the person seen in a mirror. Sakalya says its deity is the breath of life.