to me its what dubbledore told harry during the third book when harry saves peter pettigrew
".... but trust me...THE TIME MAY COME WHEN YOU WILL BE GLAD YOU SAVED PETTIGREW'S LIFE"
so maybe, its ajust a thought, maybe pettigrew will help harry in some way or other during the severnth book when harry is battling voldemort. its just a thought.
what do u think? what do u consider a significant dialogue?