Paracelsus

“All things are poison, and nothing is without poison; the dosage alone makes it so a thing is not a poison.”

“The dose makes the poison.”

“Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.”

“The art of healing comes from nature, not from the physician.”

“Man is a microcosm, or a little world, because he is an extract from all the stars and planets of the whole firmament, from the earth and the elements; and so he is their quintessence.”

“Medicine is not only a science; it is also an art. It does not consist of compounding pills and plasters; it deals with the very processes of life, which must be understood before they may be guided.”

“He who knows nothing, loves nothing. He who can do nothing understands nothing. He who understands nothing is worthless. But he who understands also loves, notices, sees... The more knowledge is inherent in a thing, the greater the love.”

“Thoughts are free and subject to no rule. On them rests the freedom of man.”

“The highest degree of a medicine is love.”

“Every physician must be rich in knowledge, and not only of that which is written in books; his own experience is his teacher.”

“Theory and practice should be together. He who is not a good practitioner will not be a good theorist.”

“Magic has the power to experience and fathom things which are inaccessible to human reason. For magic is a great secret wisdom, just as reason is a great public folly.”

“All that man needs for health and healing has been provided by God in nature, the challenge of science is to find it.”

“A mortal lives not through that which is in him, but through that which is outside him.”

“What is perceived by the senses is not science, but the subject of science.”