Sakalya said: `Whosoever knows that person whose dwelling is darkness, whose sight is the heart, 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 shadowy person, "he is he." But tell me, Sakalya, who is his devata?' Sakalya replied: `Death.'