DOCTOR: You betrayed me. Betrayed my trust, you betrayed our friendship, you betrayed everything that I've ever stood for. You let me down!

CLARA: Then why are you helping me?

DOCTOR: Why? Do you think I care for you so little that betraying me would make a difference?

WAR DOCTOR: Great men are forged in fire. It is the privilege of lesser men to light the flame, whatever the cost.