An ignorant doctor is the aide-de-camp of death.

Those who deny the first principle should be flogged or burned until they admit that it is not the same thing to be burned and not burned, or whipped and not w…

It is evident that everything which does not exist at first and then exists, is determined by something other than itself.

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes. Therefore in medicine we ought to know t…

Better to be ignorant of a matter than half know it.

Doctors are men who pour drugs of which they know little, to cure diseases of which they know less, into human beings of whom they know nothing.

The apple of knowledge is not far from here. As soon as you've eaten it, you'll know as much as I do. But be careful not to make any mistakes: most of the appl…