एवं सोम्य ते षोडशानां कलानामेका कलातिशिष्टाभूत्सान्नेनोपसमाहिता प्राज्वाली तयैतर्हि वेदाननुभवस्यन्नमयंहि सोम्य मन आपोमयः प्राणस्तेजोमयी वागिति तद्धास्य विजज्ञाविति विजज्ञाविति ॥ ६.७.६ ॥
In plain words
so, my dear, of thy sixteen parts one part was left; and being heaped about with food it blazed up, and with that thou dost now take in the Vedas. For the mind, my dear, is made of food, the breath is made of water, and speech is made of heat." And he understood this from him — he understood it.