Excerpted from the work of the Tibetan (Djwhal Khul)
through Alice A. Bailey
Next comes the quality of mental polarisation. What exactly is this power or quality? For you (at this time) it must express itself in two ways:
1. Through the life of meditation.
2. Through the control of the astral body.
Increasingly must your inner life be lived upon the mental plane. Steadily and without descent must the attitude of meditation be held—not for a few minutes each morning or at specific moments throughout the day, but constantly, all day long. It infers a constant orientation to life and the handling of life from the angle of the soul. This does not refer to what is so often referred to as "turning one's back upon the world." The disciple faces the world but he faces it from the level of the soul, looking clear-eyed upon the world of human affairs. "In the world, yet not of the world" is the right attitude—expressed for us by the Christ. Increasingly must the normal and powerful life of the emotional, astral, desire and glamorous nature be controlled and rendered quiescent by the life of the soul, functioning through the mind. The emotions which are normally self-centred and personal must be transmuted into the realisations of universality and impersonality; the astral body must become the organ through which the love of the soul can pour; desire must give place to aspiration and that, in its turn, must be merged in the group life and the group good; glamour must give place to reality, and the pure light of the mind must pour into all the dark places of the lower nature.  These are the results of mental polarisation and are brought about by definite meditation and the cultivation of the meditative attitude.
From Discipleship in the New Age, Vol. I (p 50/1) http://lucistrust.org:8081/obooks/?q=node/133
(this text is also on p. 179 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