having acquired a true knowledge of it, we shall then, in travelling
through the cities, be esteemed physicians not only in name but in
reality. But inexperience is a bad treasure, and a bad friend to
those who possess it, whether in opinion or reality, being devoid of
self-reliance and contentedness, and the nurse both of timidity and
audacity. For timidity betrays a want of power, and audacity a want of
skill. There are, indeed, two things, knowledge and opinion, of which
the one makes its possessor really to know, the other to be ignorant.