The nature of that language has not been disclosed along with other teaching concerning the evolution of the race, but like many other secrets the details of which are still preserved by the Initiates, it is implied in what has already been revealed. The application to speech of the abstract formula of evolution which they have put forward should result in its discovery, for the clue lies in correspondences; know the nature of any one thing perfectly, learn its genesis, development and consummation, and you have the key to all the mysteries of nature. The microcosm mirrors the macrocosm. But, before applying this key, it is well to glean whatever hints have been given, so that there may be less chance of going astray in our application. First, we gather from the Secret Doctrine that the sounds of the human voice are correlated with the forces, colours, numbers and forms. "Every letter has its occult meaning, the vowels especially contain the most occult and formidable potencies." (S.D., I, 94) and again it is said "The magic of the ancient priests consisted in those days in addressing their gods in their own language. The speech of the men of earth cannot reach the Lords, each must be addressed in the language of his respective element"---is a sentence which will be shown pregnant with meaning. "The book of rules" cited adds as an explanation of the nature of that element- language: "It is composed of Sounds, not words; of sounds, numbers and figures. He who knows how to blend the three, will call forth the response of the superintending Power" (the regent-god of the specific element needed). Thus this "language is that of incantations or of Mantras, as they are called in India, sound being the most potent and effectual magic agent, and the first of the keys which opens the door of communication between mortals and immortals." (S.D. I, 464)