Where prayer, amulets and incantations work it is only a manifestation of the patient's belief.

From nothing else but the brain come joys, delights, laughter and sports, and sorrows, griefs, despondency, and lamentations

What medicines do not heal, the lance will; what the lance does not heal, fire will.

It is more important to know the person who has the condition than it is to know the condition the person has.

Medicine is of all the Arts the most noble; but, owing to the ignorance of those who practice it, and of those who, inconsiderately, form a judgment of them, it is at present behind all the arts.

Many admire, few know.

The human body contains blood, phlegm, yellow bile and black bile. These are the things that make up its constitution and cause its pain and health. Health is primarily that state in which these constituent substances are in the correct proportion to each other, both in strength and quantity, and are well mixed.