Anyone wishing to study medicine must master the art of massage.
There are in fact two things, science and opinion. The former begets knowledge, the latter ignorance.
Old people have fewer diseases than the young, but their diseases never leave them.
There are, in effect, two things, to know and to believe one knows; to know is science; to believe one knows is ignorance.
The chief virtue that language can have is clarity.
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.