Contemporary knowledge about God, Evolution, and the meaning of human life.
Methodology of spiritual development.
Agni Yoga/Divine Fire
In the book  it is said: “We exclaim: Fire, Fire! However, only few understand what Fire it is…”
Yes, the Highest Hierarchs manifest Themselves in the Creation in the form of Divine Flame, non-burning to the righteous.
They also can appear above the surface of the Earth in a giant anthropomorphic Fiery form towering to the sky.
They can enter the hearts of their devoted disciples igniting the Divine Fire in them.
Full submersion of the spiritual seeker as the consciousness into the Fire and Mergence with It results in the “burning away” of all unfavorable remnants of the karma. And “burning throughout” the body with this Fire results in its healing.
… Everything in the universe is regulated by the Law of attraction. It works not only in the material world but in the spiritual world as well. All souls in the process of their positive evolution move along the Path of refinement to the Highest Magnet — to the Consciousness of the Creator in His Abode — in the Infinity. This is the law of Evolution established by God. Therefore, it is better to follow it, to live in agreement with God. This law says that we are embodied on the Earth with the purpose of developing ourselves qualitatively and quantitatively, in particular, by refining (“transmuting”) the consciousness for the sake of moving to more and more subtle layers of the Creation, for the sake of enriching the Primordial Consciousness, the Creator with ourselves.
Those who willingly walk on this Path receive His help. Those who oppose, who attach themselves to the material, who defend their separateness by growing their arrogant and petty “I”, who cultivate coarseness for the sake of achieving success in worldly affairs — such people establish their separateness from God, renounce His Love, form bad karma for themselves, and go to hell.
Therefore, one should seek Shambhala not in the mountains, where some people believe it is, but… in the highest spatial dimension.
The information about how the Highest Hierarchs help us on this Path can be found in this book.
“How little does humanity relate the idea of responsibility to the concept of Shambhala, regarding it rather as a land ordained for rest! If people would realize that the Brothers of humanity bear all the burden of human consciousness! If people would realize that We carry the responsibility for all their intentions! If people would realize that the essence of Shambhala is the Source which creates a better step for humanity!…
“The comprehension of Our Image by humanity completely contradicts the reality!
“We serve the progress of humanity!” 
“It has never been said to rely upon the Lord. On the contrary, it was repeated: ‘Be imbued with the Lord!’ There is a great difference between timid and inactive reliance and imbuing the entire being with the Consciousness of the Lord. Like a powerful sword, the consciousness merged with the Lord destroys all obstacles! Doubt cannot arise if the flaming consciousness is kindled! There will be no fatigue if the Inexhaustible Source of Strength is accepted! Fear cannot enter the temple of impenetrable armor! Thus, I advise accepting My Shields not through resorting to a ‘saving’ protection but to achieve victory through Mergence of consciousnesses.” 
Warriors Who achieve Mergence with the Divine Fire in the Infinity become “Earthly Representatives of the Hierarchy” . Through Them God explains His Will at the highest level of competence.