Andreas Vesalius quotes:

I am not accustomed to saying anything with certainty after only one or two observations.

Aristotle and many others say men have more teeth than women; it is no harder for anyone to test this than it is for me to say it is false, since no one is prevented from counting teeth.

The more fashionable doctors in Italy, began to delegate to slaves the manual attentions they deemed necessary for their patients ... that the art of medicine went to ruin.