Hope is a dangerous thing

He desperately wanted to believe, that not all his people are gone. That he wasn't alone.
And then the belief was shattered by opening the door and to see the collection shrine beacon of Timelord psychic containers.

Hope is a dangerous thing, especially when its a lie.

Such a great episode, not just because of the title but of how chilling and tragic those words are to a person when you know The Doctor. 
False hope inside a small box from the origins of Gallifrey.