Just before starting fourth year, Harry meets a man who seems like a admirable role-model who could guide him. When he gets more closer to him, Harry's distinction between Light and Dark become blurred. Making him Wonder about this man and how close they have become.
Harry was in the midst of uncertain times. After a chance encounter, a chain of events completely sabotage his already difficult start at Hogwarts. He wanted to do right by his parents, but the world was rigged to throw him back into the Dark Lord's palm. Harry wished he knew why.
Voldemort may not longer posses or use his diary. However, on occasions he records things which stick in his mind. (*Potentially* a collection of Memoirs/One Shots of the Dark Lord) *I'm coming out of a writers block right now. No grantees about consistent publishing*