Eliphas Levi
The Azoth or 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 or spiritual world, it is the First Matter of the Great Work, the source of the enthusiasm and activity of the alchemist.
In the intermediate or mental world, it is intelligence and industry. In the inferior or material world, it is physical labor. Sulfur,
Mercury, and Salt, which, volatilized and fixed alternately, compose the Azoth of the sages. Sulfur corresponds to the elementary form of Fire, Mercury to Air and Water, Salt to Earth... [Transcendental Magic, Eliphas Levi]