The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.

Time is a brisk wind, for each hour it brings something new... but who can understand and measure its sharp breath, its mystery and its design?

The book of Nature is that which the physician must read; and to do so he must walk over the leaves.

Although Alchemy has now fallen into contempt, and is even considered a thing of the past, the physicain should not be influenced by such judgements.

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

Once a disease has entered the body, all parts which are healthy must fight it: not one alone, but all. Because a disease might mean their common death. Nature knows this; and Nature attacks the disease with whatever help she can muster.

Everything is a drug; it depends on the dose.