But we say that the good man is he who has one single virtue which is perfect virtue.
 Aristotle, Politics (4th century BC). copy citation

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Author Aristotle
Source Politics
Topic virtue good
Date 4th century BC
Language English
Reference
Note Translated by Benjamin Jowett
Weblink http://classics.mit.edu/Aristotle/politics.html

Context

“the virtue of the citizen must therefore be relative to the constitution of which he is a member. If, then, there are many forms of government, it is evident that there is not one single virtue of the good citizen which is perfect virtue. But we say that the good man is he who has one single virtue which is perfect virtue. Hence it is evident that the good citizen need not of necessity possess the virtue which makes a good man. The same question may also be approached by another road, from a consideration of the best constitution.” source