Triangles: Mercury Saturn Uranus

Planets of three triangles that express the “Big Three”

The big three (Great Bear-Sirius-Pleiades), as they are expressed for each of the planetary centres: Shamballa, Hierarchy and Humanity

Concerning the planetary centres, the stream of energies from the above 3 runs:

GreatBear-Leo-Saturn
Shamballa - planetary and individual initiate: head centre (egoic purpose), base of spine (personal will)
Sirius-Pisces-Uranus
Hierarchy - planetary and individual disciple: heart centre (egoic love), solar plexus (personal desire)
Pleiades-Capricorn-Mercury
Humanity - planetary and individual aspirant: ajna centre (spiritual/abstract mind), throat centre (personal creativity) (EA 427-8)

This is distinct from the three triangles that step down the big three for our solar system

Saturn
the process of initiation, integration of the self of Leo as the height of achievement for the human soul and the ordeal… of fire, preceding the first initiation for humanity as a whole (see Leo-Uranus-Sirius)

governs two decanates in Capricorn. Hence its… potency today (WWII) in the triangle of Humanity. [it] breaks up existing conditions … thus enabling the influence of Mercury to be more fully expressed. The vision can then be intuitively perceived when obstructions have been removed.
Leo force, pouring through Saturn to Humanity and thus bringing Shamballa and Humanity into closer relation, via Capricorn, active through Mercury. (EA 442)

Mercury
the active intelligent aspect experienced by the personality in the 3 worlds (connects with its role as agent of change), leading to the initiation, and away from the densest material point, of Capricorn…
Uranus
as the 7th ray manifestation of the planetary heart centre in the externalisation of the 2nd principle of love-wisdom (Pisces) in the urge to better conditions (EA 446). See Pisces-Uranus-Sirius.

It is interesting to note that … Uranus … is today the transmitter of Sirian force via Pisces the the Hierarchy. From the “middle centre” it passes to that sensitive band of disciples, aspirants and workers to whose hearts and hands is committed the heavy task, incident to the re-organisation and the rebuilding of the shattered world structure. […] The seventh ray … aids and inaugurates the appearing of a new world order1, based on a spiritual drive and on aspiration, mental freedom, loving understanding and a physical plane rhythm which provides opportunity for full creative expression. To bring this about, energy from Shamballa (… the will-to-good) is fused and blended with the organising energy of the seventh ray and them carried to humanity along the stream of love which emanates from the Hierarchy itself. Pisces governs this effort of the Hierarchy because the highest aspect of Pisces which humanity can at this time … comprehend is that of Mediatorship … the energy of mediation, of right relationship. (EA 445)

Alice Bailey gives some passages from the “Old Commentary” that expand on these relationships, and refers to these three systemic centres which at this time and under cyclic law are Saturn, Uranus and Mercury (EA 430-3, 435)

Also see Leo-Capricorn-Pisces

  1. The phrase new world order means the best of the new age and transformation desired as the spring equinox slowly passes from Pisces to Aquarius, and is quite distinct from the unfortunate current popular use to describe an undesirable controlling elite. 

Esoteric Astrology: 421, 427-8, 435, 441-2, 548-50