They that go on this path of the gods that conducts to _brahma_ do not return to human conditions _( ib._ 15.

6).
But the Father-god of the Br[=a]hmanas is still a temporary creator, and thus he appears now (_ib._ 17): The Father-god brooded over[10] the worlds, and from them extracted essences, fire from earth, wind from air, sun from sky.

These three divinities (the triad, fire, wind, and sun) he brooded over, and from them extracted essences, the Rig Veda from fire, the Yajur Veda from wind, the S[=a]ma Veda from sun.
In the preceding the northern path of them that know the absolute (_brahma_) has been described, and it was said that they return no more to earth.

Now follows the southern path of them that only partly know _brahma_: "He that knows the oldest, _jye[s.]tham_ and the best, _cre[s]tham,_ becomes the oldest and the best.

Now breath is oldest and best" (then follows the famous parable of the senses and breath, 5.1.