In the exposition of this doctrine the old gods are retained as figures. They are not real gods. But they are existent forms of God. They are portions of the absolute, a form of the Eternal, even as man is a form of the same. Absolute being, again, is described as anthropomorphic. 'This is that' under a certain form. Incessantly made is the attempt to explain the identity of the absolute with phenomena. The power _brahma_, which is originally applied to prayer, is now taken as absolute being, and this, again, must be equated with the personal spirit (ego, self, _[=a]tm[=a]_). One finds himself back in the age of Vedic speculation when he reads of prayer (or penance) and power as one. For, as was shown above, the Rig Veda already recognizes that prayer is power. There the word for power, _brahma_, is used only as equivalent of prayer, and Brihaspati or Brahmanaspati is literally the 'god of power,' as he is interpreted by the priests. The significance of the other great word of this period, namely _[=a]tm[=a]_, is not at all uncertain, but to translate it is difficult. It is breath, spirit, self, soul. Yet, since in its original sense it corresponds to spiritus (comparable to athmen), the word spirit, which also signifies the real person, perhaps represents it best. We shall then render _brahma_ and _[=a]tm[=a]_ by the absolute and the ego or spirit, respectively; or leave them, which is perhaps the best way, in their native form. The physical breath, _pr[=a]na,_ is occasionally used just like _[=a]tm[=a]._ Thus it is said that all the gods are one god, and this is _pr[=a]na,_ identical with _brahma_ (Brihad [=A]ranyaka Upanishad, 3.9.9); or _pr[=a]na_ is so used as to be the same with spirit, though, on the other hand, 'breath is born of spirit' (Praçna Up. 3.3), just as in the Rig Veda (above) it is said that all comes from the breath of God. One of the most instructive of the older Upanishads is the Ch[=a]ndogya. A sketch of its doctrines will give a clearer idea of Upanishad philosophy than a chapter of disconnected excerpts: All this (universe) is _brahma_. Man has intelligent force (or will). He, after death, will exist in accordance with his will in life. This spirit in (my) heart is that mind-making, breath-bodied, light-formed, truth-thoughted, ether-spirited One, of whom are all works, all desires, all smells, and all tastes; who comprehends the universe, who speaks not and is not moved; smaller than a rice-corn, smaller than a mustard-seed, ... greater than earth, greater than heaven. This (universal being) is my ego, spirit, and is _brahma,_ force (absolute being). After death I shall enter into him (3.14).[8] This all is breath (==spirit in 3.15.4). After this epitome of pantheism follows a ritualistic bit: