Source: Thomas Morris [PhD (Yale)](http://www.tomvmorris.com/). [*Philosophy For Dummies* (1999 1 ed)](https://rads.stackoverflow.com/amzn/click/0764551531). p. 87.

> 
> There are some occupations in which it is impossible for a man to be virtuous.
>  — Aristotle (384–322 B.C.)
> 
> 
> 

To which occupations was he referring?