The first of the seven hermetic principles is that of mentalism whose axiom is: "Everything is mind" "the universe is mental".

The truth is that beyond the subjects called, astronomy and psychology (ie psychology in its "brain action" phase), the ancients were aware of transcendental astronomy, which is what to say about astrology; transcendental chemistry, or alchemy; transcendental psychology.

"Mental transmutation", "Transmutation" is a term generally used to designate the ancient art of gold transmutation of metals, particularly of base metals. The word "transmute" means changing one nature or form or substance into another, and is synonymous with "transforming" (Webster).

As a consequence of this, mental transmutation designates the art of changing and transforming states, forms and mental conditions into other states, forms and conditions.
From this you can see that "mental transmutation" is the art of "mental chemistry", if you like this expression, that is, a form of mystical practical psychology.

The first of the seven hermetic principles is that of mentalism whose axiom is: "Everything is mind" "the universe is mental".

INIZIO' TUTTO TANTI ANNI FA CON LA FISICA LA CHIMICA ED IL TA JI QUAN.

The world we know is built for the purpose of seeing himself.

From a quote by Spencer Brown