alchemy, there are three symbolic substances: mercury,
sulphur, and salt.
To these was added a fourth, mysterious life principle called
Universal Medicine is, for the soul, supreme reason and absolute
justice; for the mind, it is mathematical and practical truth;
for the body it is the quintessence, which is a combination of
gold and light. In the superior world, the first matter of the
Great Work is enthusiasm and activity; in the intermediate world,
it is intelligence and industry; in the inferior world, it is
labor; in science it is Sulphur, Mercury, and Salt, which, volatized
and fixed alternately, compose the AZOTH of the sages. Sulphur
corresponds to the elementary form of fire, Mercury to air and
water, Salt to earth." The spelling is said to consist of the
initial letter of the English, Greek and Hebrew alphabets followed
by the final letters of the English alphabet (Z), the Greek alphabet
(Omega) and the Hebrew alphabet (Tau).