“Mind (as well as metals and elements) may be transmuted, from state to state; degree to degree; condition to condition; pole to pole; vibration to vibration. True Hermetic Transmutation is a Mental Art.” — The Kybalion.
“Mental Transmutation” means the art of changing and transforming mental states, forms, and conditions, into others. So you may see that Mental Transmutation is the “Art of Mental Chemistry,” if you like the term — a form of practical Mystic Psychology.
But this means far more than appears on the surface. Transmutation, Alchemy, or Chemistry, on the Mental Plane is important enough in its effects, to be sure, and if the art stopped there it would still be one of the most important branches of study known to man. But this is only the beginning. Let us see why!
The first of the Seven Hermetic Principles is the Principle of Mentalism, the axiom of which is “THE ALL is Mind; the Universe is Mental,” which means that the Underlying Reality of the Universe is Mind; and the Universe itself is Mental — that is, “existing in the Mind of THE ALL.” We shall consider this Principle in succeeding lessons, but let us see the effect of the principle if it be assumed to be true.
If the Universal is Mental in its nature, then Mental Transmutation must be the art of CHANGING THE CONDITIONS OF THE UNIVERSE, along the lines of Matter, Force and Mind. So you see, therefore, that Mental Transmutation is really the “Magic” of which the ancient writers had so much to say in their mystical works, and about which they gave so few practical instructions. If All be Mental, then the art which enables one to transmute mental conditions must render the Master the controller of material conditions as well as those ordinarily called “mental.”
The student and practitioner of Mental Transmutation works among the Mental Plane, transmuting mental conditions, states, etc., into others, according to various formulas, more or less efficacious. The various “treatments,” “affirmations,” “denials,” etc., of the schools of mental science are but formulas, often quite imperfect and unscientific, of The Hermetic Art. The majority of modern practitioners are quite ignorant compared to the ancient masters, for they lack the fundamental knowledge upon which the work is based.