Bilbo: Oh, up to but not exceeding one fourteenth total profit if any. Seems fair. Present company shall not be liable for injuries including but not limited to laceration, evisceration... Incineration?
Bofur: Oh, aye. He'll melt the flesh off your bones in the blink of an eye.
Balin: You all right, laddie?
Bilbo: Yeah, I'll be. Feel a bit faint.
Bofur: Think furnace, with wings.
Bilbo: Yeah, I-I-I need air.
Bofur: Flash of light, searing pain, then poof, you're nothing more than a pile of ash.
Bilbo: [Long pause.] No. [Bilbo faints.].
Thorin Oakenshield: I would take each and every one of these dwarves over the mightiest army!
Gandalf: Home is now behind you. The world is ahead.
Thorin Oakenshield: I cannot guarantee his safety.
Gandalf: Understood.
Thorin Oakenshield: Nor will I be responsible for his fate.
Bilbo Baggins: I can't just go running off into the blue! I am a Baggins, of Bag End!
Old Bilbo: My dear Frodo, you asked me once if I had told you everything there was to know about my adventures. While I can honestly say I've told you the truth, I may not have told you all of it.
Gandalf: You'll have a tale or two to tell when you come back.
Bilbo Baggins: Can you promise that I will come back?
Gandalf: No. And if you do, you'll not be the same.
Answer: Gandalf has already convinced the dwarves Bilbo is a burglar and Bilbo realised he needs a lot to convince them otherwise. Bilbo is also intimidated by Gandlaf and confused about his claims so he is not sure how to handle the situation.
lionhead