Is not all good
Is not all evil
Good is not all good and evil is not all evil because we all have a potential of darkness and lightness in all of us. Even though a hero helps people, they can turn evil when reaching a breaking point. Evil is the same as well. Two distinct examples are Emma Swan and Regina Mills. In the second half of season four and the first half of season five, Emma turned into the Dark One because of the betrayal of her family and saving her family. While, Regina turned benevolent because she is now going the right way to seek her happiness.