Ancient Greek theaters and performances provided psychological and emotional healing for patients visiting healing centers. Dramatic performances incorporated music, which was known to have medical benefits. Witnessing performances also allowed patients to socialize as part of the healing process. Greek dramatists explored human behavior and emotions on stage to help audiences gain insight into themselves. Aristotle believed that tragedy created catharsis and purged emotions through eliciting feelings of pity and fear in spectators. Sigmund Freud later drew similarities between ancient Greek theater and psychoanalysis in probing the human psyche.