In the so-called Purusha-sukta (Rigv.
9 0) in which the supreme spirit is conceived of as the person or man (purusha), born in the beginning, and consisting of "whatever hath been and whatever shall be," the creation of the visible and invisible universe is represented as originating from an "all-offered" (holocaust) sacrifice in which the Purusha himself forms the offering-material (havis), or, as we might say, the victim.
For this reason the altar, as representative of the universe, is built in five layers, representing earth, air and heaven, and the intermediate regions; and in the centre of the altar-site, below the first layer, on a circular gold plate (the sun), a small golden man (purusha) is laid down with his face looking upwards.
And now we get the Supreme Lord in his last aspect; nay, his one true and real aspect, in which the sacrificer, on shuffling off this mortal coil, will himself come to share - that of pure intellectuality, pure spirituality - he is Mind: such is the ultimate source of being, the one Self, the Purusha, the Brahman.
The famous Purusha-hymn (R.