According to Aristotle, who is plato's disciple, the person's overall character is more important than singular actions. The person who acts determines the goodness of an action and not the other way around. People can have virtues and vices. Virtues are good character traits such as courage, penitence, truthfulness while vices are bad character traits such as cowardice, laziness and shamelessness. A good upbringing is important in becoming a virtuous or good person. Virtue ethics is a normative theory.
Golden mean helps a person in choosing the best way to act in an extreme situation where both extremes can have undesirable consequences. This is a way to come to ethical judgements and in long term can be used to build moral character.
Example
A person who committed a crime (robbery) can still be a good person in the long term as long as he acts ethically before and after that, and the robbery can be just one single bad action in an otherwise virtuous person. This way everyone has a chance at redemption in the long term.
A person who committed a crime (robbery) can still be a good person in the long term as long as he acts ethically before and after that, and the robbery can be just one single bad action in an otherwise virtuous person. This way everyone has a chance at redemption in the long term.