'Nothing of true value is located in the body of a substance, but in the virtue thereof, and this is the principle of the Quintessence, which reduces, say 20 lbs. of a given substance into a single ounce, and that ounce far exceeds the 20 lbs. in potency. Hence the less there is of body, the more in proportion is the virtue thereof.'
Paracelsus has said:
'The Magi in their wisdom asserted that all creatures might be brought to one unified substance, which substance they affirm, may by purification and purgation, 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 and 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.'