Could you please explain how the life thread / the sutratma / the silver cord, the consciousness thread / the soul thread, the creative thread and the antahkarana / the rainbow bridge physically and qua aura exactly run?
In 'Tijdloze wijsheid, Tripliciteiten in de mens' [English: 'Ageless Wisdom, Triplicities in Man'] an overview was given of the constitution of man. It consists of (1) a monadic trinity, (2) a threefold soul and (3) a threefold personality. The soul consists of (1) will or atma, (2) intuition or love-wisdom or buddhi and (3) abstract thought or buddhi-manas. The personality consists of (1) concrete thought or the mental body or kama-manas, (2) the emotion-body or the astral body or kama and (3) the physical body. This physical body then again consists of (1) a subtle physical or etheric body and (2) a gross physical body. In figure 6 of that publication an overview thereof is given.1
In 'Tijdloze wijsheid, De mens op de gebieden' [English: 'Ageless Wisdom, Man on the Planes'] the human constitution was placed on the different planes. The monad is found on the monadic plane, the soul on (1) the atmic, (2) the buddhic and (3) the manasic or mental plane and the personality on (1) the manasic or mental, (2) the kamaic or astral or emotion and (3) the physical plane. This was depicted in the figures 2 and 3.2
In 'Tijdloze wijsheid, De draden' [English: 'Ageless Wisdom, The Threads'] an overview was given of the different threads that can be descried in man, as also of their relations to the different planes. The life thread or sutratma or the silver cord runs from the monad through the different layers to in the physical body anchor itself in the heart. The consciousness thread runs from the soul through the different layers to in the physical body anchor itself in the head. And the creative thread is anchored in the throat of the physical body from where it is built through the different layers until the soul and then until the monad. The antahkarana or the rainbow bridge regards in its generality the composite thread that consists of the life thread, the consciousness thread and the creative thread, and especially where it runs between the concrete thought of the personality and the abstract thought of the soul. This is symbolized in figure 1 of that publication.3
Because these threads rather lay connections between the human principles on different planes and not so much lay connections on a same plane they cannot be pointed out as running on the physical plane; we can at best indicate their anchorages in the heart, the head and the throat.
Master Dwhal Khul through Alice Bailey also points out that the aforementioned planes and threads are not locations and wires in an objectivistic sense, but rather states of consciousness and awareness.4, 5 The general antahkarana regards initially our alignment of acting, feeling and thinking. The specific antahkarana regards the formation of our concrete thoughts in line with our abstract ideas. And eventually the general antahkarana will regard our acting, feeling and thinking according to the intuition and still later according to the will of God. The aforementioned figures then are no more than symbolic depictions.
There are however also threads that do connect centres on the same plane. These threads are known as 'ida', 'pingala' and 'sushumna'. These are located at the subtle physical plane and run between the base centre and the crown centre, and like everything on the subtle physical plane they also have their counterparts on the gross physical plane. These threads were also discussed in 'De draden' [English: 'The Threads'], and there they were symbolized in figure 3.6
These threads are in the Hindu teachings called 'nadis', and traditionally the ida is placed left, the pingala right and the sushumna in the middle.7 About the exact running of the ida and pingala there is no consensus. Different teachers may indicate different crossings in different chakras. Master Dwhal Khul through Alice Bailey then advises to not give too much attention to the exact placing of these nadis but rather attend to the energies which they represent.8
Regarding the relations between the aforementioned threads and the aura the following can be said. An aura regards a radiation of a body.9 A human thus has a physical, an emotion or astral and a mental aura. Together these auras form one synthesized aura on the etheric or subtle physical plane.10 Now the firmer and further reaching the creative thread is woven in the course of human evolution, so the firmer and further reaching the antahkarana is built, the more pure, radiating and extensive the aura of man becomes,11 for in increasing measure the soul and later the monad will influence the radiation of that aura. So in that sense the human aura does indicate for the seer the status of the antahkarana, but it will then not be directly seen as a wire running through an aura.