Winter has come.

Janos Slynt: The bars of those gates are 4 inches of cold hard rolled steel.
Jon Snow: Those are giants riding mammoths down there!

Jon Snow: [to Ramsay] Thousands of men don't need to die. Only one of us. Let's end this the old way. You against me

Jon Snow: [to Melisandre] If I do, if I fall... don't bring me back.

Jon Snow: My lady. You weren't at the war council.
Melisandre: I'm not a soldier.
Jon Snow: Any advice?
Melisandre: Don't lose.

Tormund Giantsbane: They think you're some kind of god. The man that return from the dead.
Jon Snow: I'm not a god.
Tormund Giantsbane: I know that. I saw your pecker. What kind god had a pecker that small?

Stannis Baratheon: You have many enemies in Castle Black. Have you considered sending Alliser Thorne elsewhere? Give him command of Eastwatch-by-the-Sea.
Jon Snow: I heard it was best to keep your enemies close.
Stannis Baratheon: Whoever said that didn't have many enemies.

Jon Snow: You said Lord Baelish sold you to the Boltons.
Sansa Stark: He did.
Jon Snow: And you trust him?
Sansa Stark: Only a fool would trust Littlefinger.

― George R.R. Martin, A Game of Thrones