The Hobbit: An Unexpected Journey
The Hobbit: An Unexpected Journey

Gandalf: Of course I was going to tell you, I was waiting for this very chance. And really, I think you could trust that I know what I am doing.
Elrond: Do you? That dragon has slept for 60 years. What will happen if your plan should fail? If you wake that beast...
Gandalf: But if we succeed. If the Dwarves take back the mountain,

our defenses in the East will be strengthened!
Elrond: It is a dangerous move, Gandalf.
Gandalf: It is also dangerous to do nothing or cut the throne of Erebor, it's Thorin's birthright. What is it you fear?
Elrond: Have you forgotten? A strain of madness runs deep in that family. His grandfather lost his mind, his father

succumbed to the same sickness. Can you swear Thorin Oakenshield will not also fall? Gandalf, these decisions do not rest with us alone. It is not up to you or me to redraw the map of Middle-earth.

The Hobbit: The Desolation of Smaug
The Hobbit: The Desolation of Smaug

[Smaug has been keeping the Arkenstone away from Bilbo throughout their talk, however he lets it fall within reach of Bilbo]
Smaug: I am almost tempted to let you take it, if only to see Oakenshield suffer, watch it destroy him, watch it corrupt his heart and drive him mad... But I think not. I think our little game ends here!

The Hobbit: The Desolation of Smaug
The Hobbit: The Desolation of Smaug

Smaug: You are being used, Thief in the Shadows. You were only ever a means to an end. The coward Oakenshield has weighed the value of your life and found it worth nothing...
Bilbo Baggins: No. No! You're lying!