Paracelsus
“The wisdom which man ought to have does not come from the earth, nor from the astral spirit, but from the fifth essence — the Spirit of Wisdom. Therefore man is superior to the stars and the constellation, provided he lives in the power of that superior wisdom. Such a person, being the master over heaven and earth, by means of his freewill, is called a Magus, and therefore Magic is not sorcery, but supreme wisdom.”

“The Magi in their wisdom asserted that all creatures might be brought to one unified substance, which substance they affirm may, by purifications and purgations, attain to so high a degree of subtlety, such divine nature and occult property, as to work wonderful results.
For they considered that by returning to the earth, and by a supreme magical separation, a certain perfect substance would come forth, which is at length, by many industrious and prolonged preparations, exalted and raised up above the range of vegetable substances into mineral, above mineral into metallic, and above perfect metallic substances into a perpetual and divine Quintessence, including in itself the essence of all celestial and terrestrial creatures.”
"One Thing (compared to the forces of our body) is an indestructible essence, drying up all the superfluities of our bodies, and has been philosophically called by the above-mentioned name. It is neither hot and dry like fire, nor cold and moist like water, nor warm and moist like air, nor dry and cold like earth. But it is a skilful, perfect equation of all the Elements, a right commingling of natural forces, a most particular union of spiritual virtues, an indissoluble uniting of body and soul. It is the purest and noblest substance of an indestructible body, which cannot be destroyed nor harmed by the Elements, and is produced by Art." [Paracelsus]