The dose makes the poison.

The highest degree of a medicine is Love.

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.

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

This is alchemy, and this is the office of Vulcan; he is the apothecary and chemist of the medicine.

Know that the philosopher has power over the stars, and not the stars over 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.