Full Idea
It seems that the same people are not equally good at choosing the best actions and forming the best opinions; some are comparatively good at forming opinions, but through a moral defect fail to make the right choices.
Gist of Idea
Some people are good at forming opinions, but bad at making moral choices
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1112a09)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.117
A Reaction
It is not enough to say that they CAN be separate. What type of opinions? Wise actors rarely have stupid opinions, and the opinions of bad actors usually contain error. See Jane Austen.