Heart of Darkness: The Journey into the Soul A pictures is an abstract idea, brought into context to form something concrete. They are made up and created to give off some sort of feeling or mood, that one can relate too. The atmosphere helps determine what kind of mood the picture will take. Any author, of either a painting or piece of literature will set the mood by using their atmosphere to enhance the theme of their creation. In Heart of Darkness, Joseph Conrad uses mood and atmosphere to help create a portrait called, the journey into the soul. The journey to the soul is to find one's self