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

Magic has 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.

And it is true, best is nothing concealed which shall not be discovered; for which cause a marvellous being shall come after me, who as yet lives not, and who shall reveal many things.

Some children are born from heaven and others are born from hell, because each human being has his inherent tendencies, and these tendencies belong to his spirit, and indicate the state in which he existed before he was born.

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

The art of medicine cannot be inherited, nor can it be copied from books

All things are poisons. It is simply the dose that distinguishes between a poison and a remedy.