More Harry Potter and the Half-Blood Prince (2009) quotes

Albus Dumbledore : [talking about Tom Riddle in the Great Hall] Every day, every hour, this very minute, perhaps, dark forces attempt to penetrate this castle's walls.
Albus Dumbledore : But in the end, their greatest weapon... is you.

Professor Albus Dumbledore

Albus Dumbledore : Severus... please...
Severus Snape : Avada Kedavra!

Professor Albus Dumbledore

Horace Slughorn : Harry! I must insist you accompany me back to the castle immediately!
Harry Potter : That would be counterproductive, sir!
Horace Slughorn : What makes you say that?
Harry Potter : No idea!

Harry Potter