Excerpted from the work of the Tibetan (Djwhal Khul)
through Alice A. Bailey
Just as long as a man identifies himself with his emotional body, just as long as he interprets life in terms of his moods and feelings, just as long as he reacts to desire, just so long will he have his moments of despair, of darkness, of doubt, of dire distress, and of depression. They are due to delusion, to the glamour of the astral plane, which distorts, reverses and deceives. There is no need to dwell on this. If there is one factor aspirants recognise it is the need of freeing themselves from the Great Illusion. Arjuna knew this, yet succumbed to despair. Yet in his hour of need, Krishna failed him not, but laid down in the Gita the simple rules whereby depression and doubt can be overcome. They may be briefly summarised as follows:
Know thyself to be the undying One.
Control thy mind, for through that mind the undying One can be known.
Learn that the form is but the veil which hides the splendour of Divinity.
Realise that the One Life pervades all forms so that there is no death, no distress, no separation.
Detach thyself therefore from the form side and come to Me, so dwelling in the place where Light and Life are found. Thus illusion ends.
It is his astral polarisation which lays a man open to his many emotional reactions and to waves of mass feeling of any kind. This is the cause of his being swept into that vortex of uncontrolled energy and misdirected emotional force which eventuates in a world war, a financial panic, a religious revival, or a lynching. It is this also that raises him to the heights of hilarity and of spurious happiness in which the "light deceptive" of the astral plane uncovers to him false sources of amusement, or the mass hilarity—owing to his sensitivity—sweeps him into that hysterical condition which finds its vent in unrestrained merriment and which is the opposite pole of unrestrained weeping. I refer not here to true merriment nor the proper sense of humour, but to those hysterical outbreaks of hilarity which are so common among the rank and file of humanity and lead to reactions of fatigue.
From: A Treatise on White Magic (or The Way of the Disciple), p. 308 http://www.lucistrust.org:8081/obooks/?q=node/568
(this text may also be found on p. 178 in the compilation: Serving Humanity)
I would remind you also that the life of the disciple is ever a life of risks and of dangers, entered into willingly and deliberately in the cause of spiritual unfoldment and the service of humanity. But I would ask each of you to watch your emotional life and reactions with greatly increased care; I would ask you to watch particularly for the least outcropping of glamour. I would call your attention to the fact that the emergence of emotional conditions or of glamour in your life-expression need not necessarily indicate failure. There is only failure if there is identification with these astral conditions and a succumbing to old rhythms. The success of the meditation work assigned and regularly followed may be proved to you by the appearance of these undesirable conditions; they must be then recognised for what they are, and evoke in you that "divine indifference" which permits the emotion or the glamour to die of attrition, because deprived of the "feeding-power" of the attention. The whole history of true emotional control is to be found in the sentence just given. The process of achieving this control constitutes one of the most difficult periods in the life of the disciple and quite one of the longest from the angle of time. For this you should be prepared. Particularly is it difficult at this time to triumph over emotion because of the intense emotional condition of the entire human family and the widespread fear and terror for which the energy of the Black Lodge of Adepts is responsible. This definitely complicates your problem and that of all disciples: it tends to foster a most potent glamour.  So I beg of you to proceed with courage, joy, understanding, extreme caution and—at the same time—with speed.
From Discipleship in the New Age, Vol. I (p 89) http://lucistrust.org:8081/obooks/?q=node/133
(& on p. 178 in the compilation: Serving Humanity)
Leaves Of Morya's Garden Book One The CallInto the New World my first message. You who gave the Ashram, And you who gave two lives, Proclaim. Builders and warriors, strengthen the steps. Reader, if you have not grasped — read again, after a while. The predestined is not accidental, The leaves fall in their time. And winter is but the harbinger of spring. All is revealed; all is attainable. I will cover you with My shield, if you but tend to your labors. I have spoken.--- The Agni Yoga books can be freely downloaded (available in seven languages): http://agniyoga.org/index.html
There is no salvation surer than that through devotion. One can forgive much where there is unswerving devotion. The man who is devoted in heart can be relied upon. It is cause for rejoicing when Hierarchy is upheld by devotion. At present it is especially needed. If yesterday's confusion seemed enormous, what can one say of tomorrow's? I have already prepared you for the growth of Armageddon, and you know that the black wings of darkness will not withstand the Fiery Sword. Be not astonished, the Battle increases!
Agni Yoga: Fiery World I, 605.
Excerpts from some of the books by the Master Djwhal Khul (also known as the Tibetan and the Master DK)
For Newcomers: Extract from a Statement by the Tibetan
Harmlessness (the scientific method, par excellence...of cleaning house & purifying the centres)
Transmission Meditation Groups
It is the creation, in co-operation with the Hierarchy of Masters, of a vortex or pool of higher energy for the benefit of humanity. There are more than 600 Transmission groups in 40 countries worldwide meeting on a regular basis. You may join an existing group in your area, or form your own group by simply inviting a few interested friends to meet with you at least once a week. All you need is the intention to do so and the desire to serve. There is never any fee to participate. http://www.transmissionmeditation.org
An excellent online catalogue and library documents the stages of return to the modern world of Maitreya & the Masters of Wisdom. An ongoing process for which some have been preparing humanity since 1875.
Collection of articles by Aart Jurriaanse
He wrote some compilations from Alice A. Bailey's books along with commentaries on those teachings. His work has helped many students of the Ancient Wisdom Teachings.
Agni Yoga Teachings (all the books in seven languages can be downloaded at www.agniyoga.org)
Agni Yoga Teachings regarding sex
If we compare two individuals, of whom one dissipates the vital substance while the other consciously conserves it, we will be amazed at how much more sensitive the spiritual apparatus of the second becomes. The quality of his labors becomes entirely different, and the quantity of his projects and ideas multiplies. The centers of the solar plexus and brain are being heated, as it were, by an invisible fire.
This article was dictated by the Tibetan teacher, Djwhal Khul, in 1934. It is printed in the book, The Externalisation of the Hierarchy, pp. 3-20, published by the Lucis Publishing Company. The need for trained esotericists is more urgent today than it was then.
The Alice Bailey books were published by Lucis Trust and can be purchased directly from them, or from fine bookstores everywhere: http://www.lucistrust.org
Lucis Trust has a ~new 14-page introductory PDF booklet about the 3 major full festivals