One of the reasons that he says virtues can't be created by nature is that our virtues tend to come from habits, and we cannot create a habit that is contrary to our nature making the source of morality convention. The only way we become skilled in an area is by performing that skill, moral actions being performed leads to better moral actions and behavior, which leads to habits. Aristotle breaks the human personality into three elements: passions, faculties, and states of character. He believes that morality comes from states of character as passions and faculties are not, in themselves, worthy of praise. Being a state of character it makes man good and makes his work good
One of the reasons that he says virtues can't be created by nature is that our virtues tend to come from habits, and we cannot create a habit that is contrary to our nature making the source of morality convention. The only way we become skilled in an area is by performing that skill, moral actions being performed leads to better moral actions and behavior, which leads to habits. Aristotle breaks the human personality into three elements: passions, faculties, and states of character. He believes that morality comes from states of character as passions and faculties are not, in themselves, worthy of praise. Being a state of character it makes man good and makes his work good