Mbh 5.46.1c

It is from that Seed that the five elements have arisen, and it is in it that the power resideth for controlling them. It is from that Seed that both the consumer and the consumed (called Agni and Soma) have sprung, and it is in it that the living organisms with the senses rest. Everything should be regarded to have sprung from it. That Seed called in the Vedas TATH (Tad), we are unable to describe. That Eternal One endued with Divinity is beheld by Yogins (by their mental eye). The vital air called Apana is swallowed up by the Air called Prana; Prana is swallowed up by the Will, and the Will by the Intellect, and the Intellect by the Supreme Soul. That Eternal One endued with Divinity is beheld by Yogins (by their mental eye). The Supreme Soul endued with four legs, called respectively Waking, Dream, profound Sleep, and Turiya, like unto a swan, treading above the unfathomable ocean of worldly affairs doth not put forth one leg that is hid deep. Unto him that beholdeth that leg (viz., Turiya) as put forth for the purpose of guiding the other three, both death and emancipation are the same. That Eternal One endued with Divinity is beheld by Yogins (by their mental eye). Of the measure of the thumb, ever Full, and different from this eternal organism, coming in contact with the Vital airs, the Will, the Intellect, and the ten Senses, it moveth to and fro. That Supreme Controller, worthy of reverential hymns, capable of everything when vested with accidents and the prime cause of everything, is manifest as Knowledge in creature-Souls. Fools alone do not behold him; that Eternal One endued with Divinity is beheld by Yogins (by their mental eye). Among individuals there are those that have obtained the mastery of their minds, and those that have not. Yet in all men the Supreme Soul may be seen equally.