Ing. A doctor among fools, and a fool among doctorsAmong children or young persons he may be looked upon as old or intelligent, but among elderly people he is considered as young. This was used to be said of persons of specious or imposing manners, who wished to appear more learned or wise than on trial they were found to be. A doctor among fools, and a fool among doctors, is, I think, the phrase by which we designate such characters.
Fuente: Erasmo, 3167.