Telepathy can be understood as a form of communication, and communication can be understood as an interplay between at least one sender and at least one receiver. On the physical plane communication basically takes place through the senses. We see this in the animal world, where animals communicate by scent and smell, display and sight, sound and hearing. Humans developed the latter into refined systems of speech.
Communication between senders and receivers can however also take place on other planes. Usually all forms of such 'trans-physical communication' is indiscriminatory called 'telepathy'. This however does not do right to the great variations that can be found in trans-physical communication.
There can be communication along the horizontal and along the vertical line. On the horizontal line communication basically takes place between individuals on the same plane and vertical communication basically takes place between principles of different planes.
On the horizontal line there can be communication on the physical plane, and trans-physically on the etheric, astral, concrete mental, abstract mental and intuitive plane. On still higher planes perhaps the term 'communion' is more applicable. We shall not deal with that concept here.
Etheric communication can also be called 'instinctive communication' or 'instinctive telepathy', astral communication 'emotional communication' or 'emotional telepathy', and concrete or abstract mental communication 'concrete' or 'abstract mental communication' or 'concrete' or 'abstract mental telepathy'. Terminologically emotional telepathy is often distinguished from mental telepathy by calling the first 'channeling' (and the latter simply 'telepathy').
Vertical communication occurs when the content of one principle moves the content of another principle. Such movements can go up and down the line of the physical, etheric, emotional, concrete mental, abstract mental and intuitional planes. Physical pain for instance may arouse fear and fear may bring about worry, and this could be called 'upward vertical communication'. There are also forms of downward vertical communication where for instance a to calmness brought mind brings emotions to a rest, easing the physical pain experience.
Entering the new age we may expect to see an increase of downward vertical communication from the soul levels (containing the intuitive and abstract mental levels, but also the plane of the will) to the concrete mental level (and from there to the physical brain). This form of vertical communication is terminologically often called 'inspiration'.
In this contemplation so far animals and humans were mentioned. Following this line of progression the next to mention are the masters of wisdom. As humans are the next stage of evolution for animals, so masterhood is the next stage of evolution for humans. These masters, when not working openly, utilize forms of trans-physical communication to inspire and communicate with humans who are evolved enough to bring the abstract ideas of the soul level into their concrete minds. Basically in such cases the master impresses the soul levels of his disciple, such as the abstract mind, after which the disciple brings down the ideas into the concrete levels of his personality and communicates these concretized ideas further into the physical world through the spoken or written word. The relation between the master Djwhal Khul and Alice Bailey has been exemplary for such a master to human communication.
Now in the new age humans will become increasingly sensitive to all forms of such trans-physical communication or telepathy and a true 'science of impression', as it is terminologically called, will be established. Such a science will call for an own vocabulary and this contemplation aims to contribute (very modestly) to that agenda. In the remainder of this contemplation we shall seek to come to at least sub-scientific ways of indicating trans-physical communication.
Though the contemplative sciences are always the aims in the presented contemplations we shall here depart from the contemporary academic sciences. Math for instance has certain ways of indicating horizontal and vertical relations with the characters '<', '>' and '^'. The first character when used between two numbers indicates that the first number is smaller than the second ('3<7') and the second character used as such indicates that the first number is greater than the second ('7>3'). These two characters can be very suitable for an indication of horizontal communication. The smaller number is in this case replaced by the name of the person who keeps himself void for the inflow of information and the larger number then is replaced by the name of the person full of information, so to speak, who aims at levelling that information difference through horizontal communication. Imagine for instance that Alice Bailey would have had a horizontal communicative interplay on the concrete levels with her husband Foster Bailey and would transfer information to him in this way, then the notation could be: 'Alice Bailey>Foster Bailey', or otherwise 'Foster Bailey<Alice Bailey' if Foster Bailey as a receptor is meant to be emphasized. A full sentence could for instance be: 'According to Foster Bailey<Alice Bailey the Arcane School was started in 1923.'
Things are less simple where vertical communications are concerned because words, names and mathematical formulas are basically written horizontally and not so much vertically. So even when characters indicate a level difference they are nevertheless placed in between words, or numbers in the case of math. This is the case with for instance the caret sign '^'. Where '<' and '>' due to their shapes indicate horizontal movements to the left and right, there does '^' indicate a vertical movement upward, placing the given to the right of the sign at a higher level. This makes the caret useful to indicate vertical communication, such as the one taking place between a master on the soul level and a disciple on the personality level, such as for instance between Master Djwhal Khul and His disciple Alice Bailey. The indication of such a communication then can be written as 'Alice Bailey^Master Djwhal Khul', for instance in a sentence as: 'According to Alice Bailey^Master Djwhal Khul there is one boundless immutable principle.' This notation is in line with a notation used to indicate exponentiation, such as for instance in '7^3', indicating the formula '7x7x7' and expressed as 'seven to the power of three'. Similarly 'Alice Bailey^Master Djwhal Khul' could be expressed as 'Alice Bailey to the power of Master Djwhal Khul' as the powers of disciples are exponentially increased in vertical contact with masters.
This notation of 'Alice Bailey^Master Djwhal Khul' cannot be reversed as in the case of 'Alice Bailey>Foster Bailey' because there is no character available opposing the caret '^'. However exponentiation is also indicated as 'xn', such as in '73'. Applying this notation to the vertical communication of our example we come to write 'Alice BaileyMaster Djwhal Khul'. Here 'Alice Bailey' is taken as basis towards which 'Master Djwhal Khul' is placed in a supra-position. And this notation can be reversed by taking 'Master Djwhal Khul' as basis towards which 'Alice Bailey' is placed in a sub-position, such as in 'Master Djwhal KhulAlice Bailey'. So if we want to emphasize Master Djwhal Khul as author we can write the latter. However in most cases in a vertical communicative interplay between master and disciple the latter is emphasized as author, and thus the writings of 'Alice BaileyMaster Djwhal Khul' and 'Alice Bailey^Master Djwhal Khul' are the best suitable.
Thus we have come to the conclusion at which this contemplation basically aimed: The positing of 'disciple^master' and 'disciplemaster' as suitable indications of vertical communication between a master and a disciple.