This from A Treatise on White Magic, pp 89-90
“As the man seeks to reach control of the mind, the soul in its turn becomes more actively aggressive. The work of the solar Angel has hitherto been largely in its own world and concerned with its relation to spirit, and with this the man, working through his cycles on the physical plane, has had no concern. The main expenditure of energy by the soul has been general, and outward-going into the fifth kingdom. Now the solar Angel approaches a time of crisis and of reorientation. In the early history of humanity there was a great crisis which we call individualization. At that time the solar Angels, in response to a demand or a pull from the race of animal-men (as a whole, note that), sent a portion of their energy, embodying the quality of mentalisation, to these animal-men. They fecundated, if I might so express it, the brain. Thus was humanity brought into being. This germ, however, carried within it two other potentialities, that of spiritual love and spiritual life. These must in due time make their appearance.
“The flowering forth of the mind in men, which so distinguishes the present age, indicates to the solar Angel a second crisis, of which the first was but the symbol. That for which the solar Angel exists is making its presence felt within humanity, and another strong pull. is being exerted upon the solar Angel which this time will produce a second fecundation. This will give to man those qualities which will enable him to transcend human limitations, and become a part of the fifth or spiritual Kingdom in nature. The first effort of the solar Angel turned animal-men into human beings; the second will turn human beings into spiritual entities, plus the gains of experience in the human family.
“For this the solar Angel, the soul, is organizing itself and reorienting itself so that its power can be redirected into the world of men. Contact must be made by the soul between the lower aspect of its triple nature and the aspect which has already found lodgment in the brain of man. Intelligent activity and love wisdom must be united, and the union must take place on the physical plane. In order to do this the soul is entering into “meditation deep”, in union with all other souls who may have brought their instrument into a responsive state. This is the basic group meditation, and when a man achieves what the oriental books call “samadhi”, he has succeeded in participating, as a soul, in this group meditation, and enters upon that cycle of service which expresses itself through the planetary Hierarchy. The rational mind and the abstract mind function as a unit, and the motivating principle is love. The soul, expressing love and abstract intelligence, is at one with its expression on the physical plane through the brain, and, when this is the case, the lower man has synchronized his meditation with that of the soul.
“This is the objective of our work. Let this not be forgotten, and let every effort be made to bring mind and brain into such a functioning condition that a man can slip out of his own meditation and (losing sight of his own thoughts) become the soul, the thinker in the kingdom of the soul.
“It is perhaps a new thought to some that the soul is organizing itself for effort, reorienting its forces, and preparing for a fresh and powerful impulse, but so it is. All forms of life under the force of evolution pass from initiation to initiation and the soul is not exempt from the process. Just as the soul of animal-man became united with another divine principle, and so brought into  being the fourth kingdom in nature, so the soul in humanity is seeking contact with another divine aspect. When that contact is made the Kingdom of God will come on earth; the physical plane will thereby be transformed and that peculiar period, presented symbolically under the term millennium, will come.
“The Knowers of God in that era will preponderate over those who are simply aspiring to that knowledge, and their contact and the results of the force they transmit will be felt in all the kingdoms of nature. Dominion over all forms, and the power to act as transmitters of that spiritual energy we call love is the promised reward of the triumphant solar Angels, and the prized goal of their meditation work. The Sons of God will triumph on earth in full incarnated expression, and will bring light (therefore life) to all the manifested forms. This is the “life more abundant” of which the Christ speaks. This is the achievement of the true Nirvanee who, living in unbroken meditation in the spiritual realm yet can work on earth. The work of initiation is to enable a man to live ever at the center, but to act as a distributor of divine energy in any direction and – after the later initiations – in all directions.”