"The first thing that should be contemplated in this, are the hypostatic principles; they are active substances taken from the appropriate elements, to the end of composing the elemental things. These three principles are called salt, sulphur and mercury. Where they are well proportioned, they form an enduring substance; where they are not well proportioned, the thing is perishable and impure. Purity consists of the harmony and proportion of the three, impurity in an imbalanced proportion". (The Cosmopolite, New Light of Alchemy)

"And Moses tells us that in the beginning God created the heaven and the earth, that is, the Virgin Mercury and the Virgin Sulphur " (T. Vaughan, Anima Magica Abscondita )

"All our operation in this art should be nothing other than learning to remove the sulphur from metallic bodies, by which means, our quicksilver is congealed in gold and in silver in the bowels of the earth". (The Cosmopolite, New Light of Alchemy)

"When the philosophers speak about their sulphur, one doesn't necessarily imagine that they refer to common sulphur . [.] Although they say that one must take sulphur , salt, and mercury, these three things are actually in their matter". (Dom Pernety, Mytho-Hermetic Dictionary )

"For Tophet is ordained of old; for the king it is prepared; he hath made it deep and large: the pile thereof is fire and much wood; the breath of the LORD, like a stream of brimstone , doth kindle it". ( Isaiah 30, 33)