Full Idea
Prudence ('phronesis') is not concerned with universals only; it must also take cognizance of particulars, because it is concerned with conduct, and conduct has its sphere in particular circumstances.
Gist of Idea
Prudence is mainly concerned with particulars, which is the sphere of human conduct
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1141b14)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.213
A Reaction
Note that 'phronesis' is partly concerned with universals, although it is crucial to Aristotle's theory that each particular situation is different, and so no rules can actually dictate moral action.