Tyrion Lannister: I know you love her. I love her too. Not as successfully as you. But I believed in her with all my heart. Love is more powerful than reason. We all know that. Look at my brother.

Jon Snow: "Love is the death of duty."

Tyrion Lannister: You just came up with that?

Jon Snow: Maester Aemon said it a long time ago.

Tyrion Lannister: Sometimes duty is the death of love.