"He is a powerful wizard who has already destroyed one dark wizard. He is the only one that the man who killed your parents truly feared. He is willing to do whatever it takes for his cause and is the personification of the phrase,  the ends justify the means ," Severus said, pausing as he thought back to how Albus had used him as a spy when he promised to save Lily. "But I do not know if he is a good man or not. You need to make that assessment yourself when you begin Hogwarts in five years."