Naruto vanquishes the evil in his heart because the loneliness which created it is past. Killer Bee shows him how to tame the demon fox: by removing the seal keeping the fox within him and overpowering it. The fox's strength and cunning are too much for him, and he is almost defeated; the spirit of Kushina Uzumaki stops the fox, reveals herself as Naruto's mother and gives him the resolve to contain the fox. Kushina tells Naruto how she and Minato fell in love and how the demon fox was originally sealed in her; Madara Uchiha used the fox to attack Konoha, and Kushina and Minato (believing that Naruto would defeat Madara) gave their lives to seal the fox's power in him. Kushina feels guilty about what Naruto has been through, but he does not blame her and allows her to pass on with no regrets.