“I smell guilt. There is a stench of guilt upon the air.
I see you all, whole and healthy, with your powers intact — such prompt appearances! — and I ask myself . . . why did this band of wizards never come to the aid of their master, to whom they swore eternal loyalty? And I answer myself, they must have believed me broken, they thought I was gone. They slipped back among my enemies, and they pleaded innocence, and ignorance, and bewitchment. . . .
And then I ask myself, but how could they have believed I would not rise again? They, who knew the steps I took, long ago, to guard myself against mortal death? They, who had seen proofs of the immensity of my power in the times when I was mightier than any wizard living? And I answer myself, perhaps they believed a still greater power could exist, one that could vanquish even Lord Voldemort . . . perhaps they now pay allegiance to another. . .” - Harry Potter and the Goblet of Fire