QUOTE : Dumbledore accepts the responsibility: the two of them have entered into a bond. Dumbledore’s condition requires Snape to develop more understanding, more protectiveness, toward James and Harry as well as the person Snape loves: this is a magic spell. Snape has increased the range of his protectiveness because of an interaction with the man who accepted his plea for help. Snape is already more powerful than he was before. Anything. Narcissa came to Snape for the Unbreakable Vow in the same state of absolute desperation, saying there was nothing anymore that she would not do. Snape is pledging himself to Dumbledore because the life of a loved one is more important to him; he is offering his life for Lily’s. Dumbledore will use the new power he has just gained over Snape to continue to ask more love of Snape, more sacrifice, more protectiveness toward others. Not all of us are born into lives of love; not all of us receive the love we crave.