“It all just disappears, doesn’t it? Everything you are, gone in a moment, like breath on a mirror. … We all change. When you think about it, we’re all different people, all through our lives, and that’s okay, that’s good. You gotta keep moving, so long as you remember all the people that you used to be. I will not forget one line of this. Not one day. I swear. I will always remember when the Doctor was me.”
Episode: The Time of the Doctor, December 2013
(Notable posts about Matt’s Doctor here and here.)