Answer
In the Greek Doctrine of Ethos, man should try to balance between Logos or rational behavior and Pathos or behavior driven by emotion.
Step-by-step explanation
The Greek doctrine believes that music has a magical power that could talk directly to our emotions. According to the doctrine of Ethos, the right kind of music has power to shape the character of a person including healing the sick. A person listening to music will have the emotion imitated by the music.