Be not another, if you can be yourself.
Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.
Time is a brisk wind, for each hour it brings something new.
Let no one who can be his own belong to another.
Medicine rests upon four pillars - philosophy, astronomy, alchemy, and ethics.
The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.