What are the motifs in Candy by Luke Davies?

Hopelessness is a recurring idea in the book.The narrator feels sad when he uses heroin and physically ill when he doesn't. When he is in the dreamlike states in certain chapters, there is underlying despair in his words. He uses images, such as an eagle soaring, to explain that he is hopeless. He wants to fly free like the eagle and thinks it's possible, but he can never achieve it. As he goes deeper into his addiction, the more hopeless he feels in these dreamlike states. He can't see any hope through the fog.