(..) that wand was failing you. It will always fail... I killed Snape! But what if the wand never belonged to Snape? What if its allegiance is always to someone else? Oh, come on, Tom... Let's finish this the way we started. Together! Die! (..)

(..) This was the wand of Draco Malfoy. Was? Is it not still? Well, perhaps not. If you won it from him. I sense its allegiance has changed. You talk about wands, as if they have feelings... ... can think! The wand chooses the wizard, Mr. Potter. (..)