1. The instinctual nature as it develops into the mind nature and makes a transition into an automatic, subconscious character and - at the same time - assumes some of its paralleling higher qualities.
2. The lower concrete mind in its more developed stage, as it gradually assumes control and supersedes instinct in the consciousness of man. The Buddhas of Activity preside over what might be called (using a technical, occult term) the ahamkara principle - the mind as it serves the selfish interests of man and enables man thereby to achieve a sense of proportion and a finer estimate of values. Forget not that selfishness is a stage of unfoldment, and that it is a necessary stage whereby humanity learns the price of self-interest.
3. The personality mind. This assumes control over the man and leads him to prove the nature of power and of success and - above all else - of integration. This too is a necessary phase and precedes a stage of awakening.

Within the body of the planetary Logos humanity is slowly building that which they call the antahkarana; this is, in reality, the linking thread between the head center of Sanat Kumara and His heart center. Ponder on these words. There is a mystery involved here and it is little that I can do to make it clearer. As humanity builds or creates the triangles of light and of goodwill, they are in reality invoking a response activity from two of the Buddhas of Activity - the One Who works through the medium of the will aspect, and the One Who works through love in humanity, intelligently applied. Forget not that these three great Buddhas summarize in a peculiar sense the transmuted essence of the previous solar system in which intelligent activity was the goal. Today, that essence underlies all the activity of this solar system but is motivated by love, which was not the case in the earlier manifestation. The Buddhas Themselves form a deeply esoteric Triangle.

From the triangles now being created and those later to be assembled, the Buddhas of Activity will extract that essential quality (at present very rarely to be found) which will go to the building of this aspect of the planetary antahkarana.

The triangles of light and of goodwill are essentially invocative. They constitute the A.B.C. of the coming Science of Invocation. Their strength is dependent upon the depth of feeling in the one case, and the strength of the will in the other, with which they are created. I have here given those disciples who are launching this new project which is so close to my heart a new and useful hint. This work must go on. It is because the entire concept is so new and different to anything hitherto projected that it seems so impossible of achievement; the triangles project has its incentive in such highly esoteric sources that some disciples regard the work as exceedingly difficult and thus complicate, by their thinking, its essential simplicity; others regard it as the simplest thing in the world, and by an emphasis upon the exoteric and the organizational angle, they again hinder the true type of triangle being created. Disciples need to be aware of the true proposed plan and find ways to make clear the middle position between the difficulties brought forward and the simplicities which distort.