Triangles: Taurus Capricorn Aquarius

The constellations behind the “holy three”: Mercury-Venus-Earth

Little is given about this, other than a passage from the Old Commentary, quoted here in full:

Just as humanity strives towards the Hierarchy, so that Hierarchy itself strives towards Shamballa. As the Old Commentary has it: He who sees in the dark light of Shamballa penetrates to that which lies beyond our little sphere to that which can be sensed behind the holy triangle [Mercury-Venus-Earth with Venus first]. There is to be found the point of radiant fire which shines within the eye (Taurus), which burns upon the mountain-top (Capricorn) and which the water cannot quench (Aquarius). These are the holiest three.

To make this triangle relevant to humanity, this marks three key points of the will aspect or three fires represented by “Shamballa”1:

Taurus
Mercury: The third eye, illumination and personal integration, initiating the path of will. The will-to-liberation Capricorn
Venus: The third initiation and exit from the human kingdom. Aquarius
Earth: The ability to handle the astral/emotional levels and freedom from the necessity to learn by emotional pain. The will-to-serve (from EA 390)
  1. Shamballa is the planetary centre that focusses the will aspect on Earth 

Esoteric Astrology: (390), 594