If we want to make a statement about a man's nature on the basis of his physiognomy, we must take everything into account; it is in his distress that a man is tested, for then his nature is revealed.

Thoughts give birth to a creative force that is neither elemental nor sidereal. Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow. When a man undertakes to create something, he establishes a new heaven.

Many have said of Alchemy, that it is for the making of gold and silver. For me such is not the aim, but to consider only what virtue and power may lie in medicines.

The art of medicine has its roots in the heart.

Every body consists of three ingredients. The names of these are Sulphur, Mercury, and Salt.

The right dose differentiates a poison from a remedy

What the eyes perceive in herbs or stones or trees is not yet a remedy; the eyes see only the dross.