First Ray triangle
The following applies to all seven ray triangles:
The seven stars of the Great Bear are the originating sources of the seven rays in our solar system [which] express themselves through the medium of the seven planetary logoi [which in turn] manifest through the medium of the seven sacred planets. Each [ray] is transmitted into our solar system through [a triangle of] three constellations and their ruling planets (422-3)
This relation is the basis of the entire science of triangles and, therefore, of astrology itself; it is also related to the rays, the constellations, their ruling planets and our Earth in a great synthesis of energies; it relates our solar system to the larger whole and our tiny non-sacred planet to the solar system. (489)
These seven triangles of energy … pour their force through one of the constellations in each triangle (490)
This inter-relation is effective in this world cycle and will remain so until the end of the Aquarian Age.
See table (423, 489-90) and controlling signs (illustrated with connecting lines to signs) on the site map.
The basic triplicity adhered to in Bailey’s work is that of life, consciousness and form, reflected in triplicities such as the first three rays, and the three qualities of the cardinal, fixed and mutable crosses
The controlling point of the first ray triangle is ‘Aries: this constellation, as might be expected, is the source of the initial energy, producing the New Age’ (for further information on the part Aries plays in this particular process, see the Aries-Leo-Virgo triangle which is given as instrumental in the process of inaugurating the New Age, the original meaning of which is explained there.)
is the constellation through which initiating conditions will stream into our solar system. It embodies the will-to-create that which embodies the will-to-good. […] you have the influence of Mars and Mercury - the one bringing conflict and the death of the form and the other bringing illumination and the development of the intuition as a result of that conflict and death. New cycles of being and of consciousness are initiated by conflict. […] If, however the result of this initiating, energising will is to produce such beneficient effects of intuitive understanding and the activity of Mercury as the messenger of the Gods, it can be seen how truly through conflict the will-to-good can be wrought out.’(619)
…through which the will-to-fulfillment or to achievement pours into humanity and on to the planet. It is essentially the spirit of self-determination. It is at first the determination of the little self, the personality, the self-conscious individual. It is next the determination of the Self, the soul, the group conscious individual, aware of the greater whole and of itself as the part, integrated [within itself] and basically at-one.
This will-to-good (achieved through fulfillment) works out in relation to the human being through the medium of three climaxes [of fulfillment]:
The will-to-good, demonstrated by the achieving of self-consciousness.
[Form: body, appearance, the third ray or aspect]
The will-to-good, demonstrated at the third initiation [when the individual personality functions in a balanced manner automatically to express the will of the soul, and the desire for personal experience has been exhausted as a learning process] when self-consciousness gives place to group consciousness.
[Quality: soul, consciousness, the second ray or aspect]
The will-to-good, demonstrated in the higher initiations when [monadic] consciousness is achieved. (Don’t even think about it. If you were there you wouldn’t be reading this…)
[Life: spirit, the first ray or aspect]
…by means of which comes the conquering will which releases from form life and initiates the man into the kingdom wherein the will aspect (not the soul aspect) […] expresses itself. […] there is a close connection between the Earth and Capricorn. The reason for this is that the Earth provides ideal conditions for this particular type of achievement because it is in process of transforming from the stage of a “non-sacred planet” into that of a “sacred planet”. This is why Saturn is so powerful a ruler and transmitter to the Earth of the dynamic quality of the first ray of power. (Esoteric Astrology, 621)
First ray, Aries is the controlling sign.
References from Esoteric Astrology: 423, 485, 619-21, 193-4 (with Virgo)