Man, dear, is made of sixteen parts. Eat nothing for fifteen days, but drink as much as you wish; for vital Breath, being formed of the Waters, is cut off if you do not drink.

He ate nothing for fifteen days, and then returned to the Master, saying: What shall I repeat, Master?

Repeat the songs and liturgies and chants, dear; said he.

None of them come back into my mind, Master; said he.

He said to him: As, dear, after a big fire, if a single spark remain, as big as a fire-fly, it will not burn much; just so, dear, of your sixteen parts one remains, and by this one part you cannot remember the teachings.

Go, eat; and then you will understand me.

He ate, and then returned to the Master; and whatever the Master asked, all came back to his mind.

The Master said to him: As, dear, after a big fire, if even a single spark remain, as big as a fire-fly, and if it be fed with straw, it will blaze up and will then burn much; just so, dear, of your sixteen parts, one part was left; and this, being fed with food, blazed up, and through it you remembered the teachings.

For Mind is formed of Food; vital Breath is formed of the Waters; formative Voice is formed of Radiance.

Thus he learned; thus, verily, he learned.

ARUNA'S son Uddalaka addressed his son Shvetaketu, saying: Learn from me, dear, the reality about sleep. When a man sinks to sleep, as they say, then, dear, he is wrapped by the Real; he has slipped back to his own. And so they say he sleeps, because he has slipped back to his own. And just as an eagle tied by a cord, flying hither and thither, and finding no other resting place, comes to rest where he is tied, so indeed, dear, the man's Mind flying hither and thither, and

finding no other resting place, comes to rest in vital Breath; for Mind, dear, is bound by vital Breath.

Learn from me, dear, the meaning of hunger and thirst. When a man hungers, as they say, the Waters guide what he eats. And as there are guides of cows, guides of horses, guides of men, so they call the Waters the guides of what is eaten. Thus you must know, dear, that what he eats grows and sprouts forth; and it cannot grow without a root.

And where can the root of what he eats be? Where, but in the world-food--Earth?

And through the world-food--Earth--that has sprouted forth, you must seek the root, the Waters. And through the waters that have sprouted forth, you must seek the root, Radiance. And through Radiance that has sprouted forth, you must seek the root, the Real. For all these beings, dear, are rooted in the Real, resting in the Real, abiding in the Real.

And so when the man thirsts, as they say, the Radiance guides what he drinks. And as there are guides