Heart Of Darkness: Themes in Garden of Evil and Heart of Darkness Independent Novel Study- Theme Theme: is the central topic or dilema in the story. The theme directly involves the main character. The story of the Garden of Evil relates to Heart of Darkness in the way that the themes are similar. For example the evil that lies within us. Yes I believe that the statement "Evil is Inherent in the Hearts of Men" is true. Everybody has evil in them although a restriction would have to be put on the statement to say that evil is inhe