In order to celebrate the today alignment Sun-Mercury-Earth at the entrance of Taurus–Scorpio axis — exalted Light and Harmony –, here are some excerpts from Spiritual Astrology (p. 269-273) about the Messenger of the Gods, the divine Builder of bridges (antahkarana) and systemic Eye of Revelation through the power of Word (Mantrika-shakti):*
“Mercury is the compromising principle between the higher and the lower worlds. For this reason, he 
is called the messenger to Gods, the speech of the divine beings and the arbitrator of the angels. He is the agent of divine alchemy to transform the baser metals of the lower triangle of man into the king of the metals which moulds the higher triangle. Muladhara, Swadhishtana and Manipuraka form the lower triangle. Sahasrara, Ajna and the birthplace of Indra** form the higher triangle. The throat-centre is linked up with the lower triangle. The heart-centre is linked up with the higher triangle. The heart and throat-centres form the field of transactions of Mercury. The vocal cords regulate the expression of sound. The lungs conduct respiration. The heart is the birthplace of the word. The word of man starts from the consciousness of “I am” within the heart. It travels to the Ajna chakra to be translated into an impression. It is translated there by the power of Mercury into thought and the thought is translated into language. Then it is uttered forth through the vocal cords. This is the process of the act of speech in the average man. There is a profound truth in the impression of the astrologers that Mercury is the Lord of speech. If Mercury in the horoscope is badly afflicted, the subject lacks a powerful self-expression. His words fail to command or attract the attention of others.
When man is speaking, his outbreath causes an upward pull from the solar plexus. This is the link of Mercury with the lower triangle. Always, man can be raised from the lower pole through his speech if only he cares to mean what he speaks. The link of mind with speech gives a cogency of thought-power and utterance to raise the activity of the lower triangle. Here lies the scientific truth that the student of spiritual path has to gain control over his speech before he can hope for any real progress along the first steps. Speaking out good thoughts and keeping silence about unnecessary things is the first essential step. Avoiding misrepresentation of thought in the word is the next step. Full surrender of the right of judging others in thought and word is the later step. Careful analysis of thought and aspiring for the fitness of words is the step that follows. Word becomes mantram, only when these steps are practised. Then only his Mercury begins to work as the mouth-piece of Gods and reveals to him the plan of the higher intelligences that are at work.
Mercury by Giambologna
Every word of our speech has got its origin in the Cosmic will. The Cosmic Will prepares the speech of man and stimulates the buddhic plane of man [intuition, Love-Wisdom]. This stimulation descends to the heart-centre via the Ajna chakra. Then, there is the human stir for the origin of the word in that centre. This gives an effort to the throat-centre through the force of respiration. In the meanwhile, the concept of the word that is prepared in the cosmic level via solar and planetary consciousnesses descends to Ajna chakra and is received by the buddhic plane of Mercury. Here, Mercury translates it and gives out through the effort, that is produced earlier by respiration and vocal cords. Thus, we see that the evolution of word in man is a double process very much like the evolution of man.
The activity of the utterance of a word that lies lower than the buddhic plane is governed by Mercury. The higher counterpart of the word, which directly descends as impression belongs to Jupiter. This relationship between the activity of Mercury and Jupiter [Harmony through Love and Love through Harmony – 4th and 2nd Rays] is represented in the opposition aspect between Gemini and Sagittarius.
There is a higher counterpart of Mercury on the cosmic level and it is personified as Narada. The double-link of the higher and the lower triangles in man, which forms the perfect instrument of speech, is called Veena, the musical instrument of Narada. The linking channels of Mercury which lie on the vital, mental and the buddhic planes, are called the strings of the instrument. They are said to vibrate and produce the musical composition of thought as word, through the agency of air, the breath of man. Narada is said to have a direct access to Narayana, the seventh plane of the supra-cosmic universe. Narada can descend from that plane to the lowest earth-plane.
When the activity of the word is at play in the lower planes of man, it leads to discussion, differences of opinion and individual concepts. At this stage, speech fails to be a proper vehicle for understanding. Every man responds to every word in his own way, depending upon his previous associations. As the import of words grows subtler it multiplies in its shades of meaning and the terms used by men grow abstract. That is why Narada is described as “Kalahasana” (one who dwells upon disputes). When speech is applied to the Jupiterian impression of words (wisdom-level), Narada assumes the role of the adept and takes up the role of one imparting the name of God.
Mercury has no message of his own, except to convey those of the higher levels of man to the lower. For this reason, a man who is governed by Mercury in his horoscope, will be above motives. Soon he learns to live in the purest intuitional plane, transmitting the wisdom of the higher planes to his fellow-men through books, oration or teaching, initiation and group-training. He will have a fine organising ability. But when the man of the lower planes is governed by Mercury in the horoscope, he will lack continuity of purpose. He has neither any mission nor duties in life. He grows into an intellectual flirt creating problems, misrepresenting things and confusing others with his quickness in the jugglery of words, in the guise of a mature philosopher and thinker.
Mercury transacts business on the mundane plane and wisdom on the spiritual plane. All the deceptions of the educational aristocracy of all times, which enabled man to take advantage over the more backward races and individuals of the world, is a play of Mercury on the mundane plane. Under his influence, much logic is propagated as philosophy and science; much emotion and sentiment of the baser levels are passed off as poetry and many who gather others’ thoughts are presented to the world as original thinkers.
(…) The workings of the cosmic planet Narada reaches our Mercury through the Pole Star [Dhruva]. The solar system of the Pole Star was raised to the level of liberation by linking it up with the seventh plane of the supracosmic world, Narayana, through the initiation caused by Narada.
Mercury governs the prenatal [bridging] consciousness of man. The ego in the womb constructs its head-centre under the supervision of the Pole Star. It builds the throat-centre under the influence of Mercury who is progressing from the pre-natal chart. (…)”
The Art of loving Words
raises our beloved Blue Planet along the Direction of Stars
* For Esoteric Astrology, Mercury rules in our solar system the 4th Ray and Human Hierarchy of the Initiates (spiritual souls) through the Sign of Scorpio, associated to the 4th buddhic plane and the force of Mantrika-shakti, “The force latent in sound, speech and music”, the Verb/Christ made flesh.
** “…the birthplace of Indra (the gap between the Pineal and the Pituitary body that is filled up by the spiritualist) (…) The inner contents of the head form the seat not only of the mind but also of the buddhi. For this reason the ruler of Aries is Mercury for a man of the spiritual path. The head contains the pineal gland and the pituitary body. They form the counterpart of the village Shamballa where the path to the Lord is paved as the higher bridge linking these two centres. This bridge is called the birth place of Indra (Indra Yoni). The construction of this bridge comprises of the two other signs Taurus and Pisces. The Pleiades and the stars of the constellation of the Fish cooperate in this process. (…) The region between the throat-centre and the birthplace of Indra (a point just above the Ajna-centre and below the minor head-centre) contains all the seven main centres which bear their correspondences in the seven centres along the vertebral column.
There are seven other centres above the neck (the portion of body ruled by Taurus) which bear a direct correspondence and relationship on the Solar-Cosmic level (second bridge) with the seven stars of the constellation of Pleiades.
(…) Neptune is the exclusive ruler of Pisces and he serves a double function. His role as Varuna is to work out the disciples to lose their lower consciousness (personality) into the higher consciousness or group-consciousness. This is up to the end of the construction of the Higher Bridge. For those who follow the path of grace, Neptune reflects the mysterious rays of another cosmic force, a higher one called Indra. This starts with the merging of chakras and finds its completion in the blossoming of the lotus that is located within Brahmarandhra and near Ajna-chakra. The function of Indra is to expand the soul-consciousness of the disciple to find its fullest expression in the spiritual consciousness on the level of Shamballa, via the Hierarchy.
” (Master E. K., Spiritual Astrology, p. 160, 84, 92-3, 201).
Viewed as standing between the sun and the moon, Mercury acts as the Egyptian Thoth, who was called the Reconciler between Horus and Set, the symbol of the mind of man. Thus, Mercury in man is the thinker, the reincarnating Ego and link between spirit and matter, the messenger between the divine within and the personality.
Hermes is said to have been the offspring of Zeus and Maia who, as one of the Pleiades, was a star connected with the manifestation of sound.
From the luminous matrix of Maya, Maia, Vach or Sophia, the God-mind was born.
The Greeks called this kurios, the pure, unmixed intellectual wisdom which is Hermes-Mercury, Thoth-Hermes , the seminal principle of Logos, scattered throughout the universe, the fiery, radical moist of Mercury , which activates the feminine aspect of fire – kundalini shakti, the power behind the sounds, numbers, letters.
While watching over his herds and flocks, Hermes, the Master Shepherd and Messenger of the Gods, wove together the notes of life and death and all the pairs of opposites in a melody of the sevenfold flute.
This is echoed in the Christian scheme wherein the Sun is the Father, Mercury the Son, and Venus the Holy Ghost – the spirit of wisdom, love and truth associated with Christ.
As the Son of the Father, Mercury receives seven times more light than any other planet. Occult knowledge of this led the Gnostics to call Mercury-Christos the sevenfold light.
And Earth is the chalice of Holy Spirit, the Hierarchy – is the recipient of Venusian energies, facilitated by Mercury, which were imprisoned in matter by Mars – kundalini dormant in matter, by lunar angels.
The breath of the soul’s pure voice, can be heard when the transverse vibrations of the lower nature move in harmony with the longitudinal impulse of that divine melody.
The scale and harmony of the music of the spheres – manifests through vibrations of the hierarchy of the gods and all the divine heavenly hosts; its seven octaves being strictly analogous to the scale of chemical elements as well as to colour.
In the light of this the vast mathematical philosophy of Pythagoras can, perhaps, be a little better understood.
He taught that a tone measured the distance from the earth to the moon, a half-tone from the moon to Mercury and so forth until the measurements touched upon the zodiac itself, thus making of seven basic tones the diapason of nature.
Following this, one can begin to conceive of all forms, ratios, dimensions, densities and constitutions of matter in terms of vibrations.
And one can conceive of the process of manifestation as the fundamental principles of musical proportion.
The seven octaves of the Lord’s cosmic melody flow unfettered through the sheaths, each aperture of the divine flute leading the sound from one upadhi ( plane of manifestation )to another.
From above below, the octave notes descend through the chambers ( subtle bodies) which the carefully aligned finger-holes of the flute create.
Their use correspond to the chakras just as the mouthpiece corresponds to the soul’s breathing-hole into the world.
If the disciple would become a flute through which the Lord’s music may pour, then every dimension and ratio of his being, every material which makes up his atomic nature, every breath that he evenly and slowly breathes, must be in perfect mathematical harmony with the music of the spheres.
It is said that the vibrating chords link a privileged one ( initiate) – to their echoing counterparts in the globes and planets of the solar world, and they come to realize the universe within themselves.
He who hears and becomes flooded with the divine melody becomes like an instrument of Krishna – Shakti:
“I am thy flute; reveal to me thy will; breathe into me thy breath like into a flute, as thou hast done to my predecessors.”
In order to hear the pure strains of Krishna’s flute, Mantrika – shakti, the disciple must maintain ceaseless contemplation and unwavering allegiance to the beloved Lord.
A carefully nurtured dialogue should be sustained within consciousness like a delicate interplay between the plucked strings of the manifesting harp ( the composition of the subtle bodies ) and the divine promptings of the airy flute ( energy centres).
One must prepare the chambers ( create the triangular alignments between the centres in the head and the major centres in the spine ) – for the divine breath of creation in order to share the ‘joy of the dance of the Logos’.
And he must learn to focus his soul’s breath obliquely ( meditate), so that its melody may pour forth in measured stages of proportion producing perfect harmony in and all around him.
from https://theosophytrust.org