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

In every human being there is a special heaven, whole and unbroken.

A mortal lives not through that breath that flows in and that flows out. The source of his life is another and this causes the breath to flow.

All numbers are multiples of one, all sciences converge to a common point, all wisdom comes out of one center, and the number of wisdom is one.

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

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

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.