What does virtue mean?
Virtue refers to the positive characteristics which someone demonstrates in their behavior.
Virtue is the meaning of the Moral Principle, elevating society from one of freedom to a society of peace.
Importing moral preferences into law creates an endless political war over whose values dominate. The Legal Principle prevents this situation from occurring, and keeps moral values outside of legal rules.
The Moral Principle is voluntary and aspirational. It is never coerced. The Moral Principle can also be thought of as promoting nine aspirational values.