QUOTE : It is no wonder that Snape is feeling the strain of being the only one who can help Draco, the only one who can fight some forms of Dark Magic, the only one who can retain Voldemort’s trust while taking his place at Dumbledore’s right hand. In some ways, it’s a bit similar to being the Chosen One, although Harry gets credit for his sacrifices and the blessing of a clean conscience. Snape’s job depends upon his guilty past and upon the secrecy that ensures his sacrifices will never be seen.