Plato's theory of ethics, known as the Theory of Forms, stipulates that a person's well-being aims for the highest level of morality, but a person's virtues provide the skills necessary to attain a desired level of morality. Plato's theory of ethics deems happiness as the ultimate level of perfection.
The Theory of Forms is based on the belief that good is the highest form. Plato's theory of ethics evolved over time as he worked with his mentor, Socrates. In his works, Plato argues that a person's soul determines the state of the person's happiness, thus indicating that a good soul indicates a good life.