Whether wine is a nourishment, medicine or poison is a matter of dosage

All arts lie in man, though not all are apparent. Awakening brings them out. To be taught is nothing; everything is in man waiting to be awakened.

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.

The beginning of wisdom is the beginning of supernatural power.

Let no one who can be his own belong to another.

Every physician must be rich in knowledge, and not only of that which is written in books; his patients should be his book, they will never mislead him.

It should be forbidden and severely punished to remove cancer by cutting, burning, cautery, and other fiendish tortures. It is from nature that the disease comes, and from nature comes the cure, not from physicians.