Virtue...

Virtue, 

like art, 

constantly deals with what is hard to do, 

and the harder the task the better the success.

~Aristotle

An exerpt from Wikipedia:
Virtue is a behavior showing a high moral standard and is a pattern of thought and behavior based on high moral standards. Virtues can be placed into a broader context of values. Each individual has a core of underlying values that contribute to his or her system of beliefs, ideas and/or opinions (see value in semiotics). Integrity in the application of a value ensures its continuity and this continuity separates a value from beliefs, opinion and ideas. In this context, a value (e.g., Truth or Equality or Creed) is the core from which we operate or react. Societies have values that are shared among many of the participants in that culture. An individual's values typically are largely, but not entirely, in agreement with his or her culture's values.
Individual virtues can be grouped into one of four categories of values:

• Ethics (virtue - vice, good - evil, moral - immoral - amoral, right - wrong)
• Aesthetics (unbalanced, pleasing)
• Doctrinal (political, ideological, religious or social beliefs and values)
• Innate/inborn