In reply to KaWai:
Allegory of Vice and Virtue / The Choice of Hercules
But are politicians elected because of their ' human nature ' or their 'capacity ' to be ' virtuous ' ..... to make the right choices ...
DELIBERATE CHOICE
Although the virtues are habits of acting or dispositions to act in certain ways, Aristotle maintained that these habits are acquired by engaging in proper conduct on specific occasions and that doing so requires thinking about what one does in a specific way. Neither demonstrative knowledge of the sort employed in science nor aesthetic judgment of the sort applied in crafts are relevant to morality. The understanding {Gk. dianoia [diánoia]} can only explore the nature of origins of things, on Aristotle's view, and wisdom {Gk. sofia [sophía]} can only trace the demonstratable connections among them.
But there is a distinctive mode of thinking that does provide adequately for morality, according to Aristotle: practical intelligence or prudence {Gk. fronhsiV [phrónêsis]}. This faculty alone comprehends the true character of individual and community welfare and applies its results to the guidance of human action. Acting rightly, then, involves coordinating our desires with correct thoughts about the correct goals or ends.
This is the function of deliberative reasoning: to consider each of the many actions that are within one's power to perform, considering the extent to which each of them would contribute to the achievement of the appropriate goal or end, making a deliberate choice to act in the way that best fits that end, and then voluntarily engaging in the action itself. (Nic. Ethics III 3) Although virtue is different from intelligence, then, the acquisition of virtue relies heavily upon the exercise of that intelligence.
Ref>http://www.philosophypages.com/hy/2s.htm