1
" When you run with the Doctor, it feels like it'll never end. But however hard you try you can't run forever. Everybody knows that everybody dies and nobody knows it like the Doctor. But I do think that all the skies of all the worlds might just turn dark if he ever for one moment, accepts it. Everybody knows that everybody dies. But not every day. Not today. Some days are special. Some days are so, so blessed. Some days, nobody dies at all. (In the library, the Doctor walks back to the TARDIS. He stops, looking at the doors. Then he raises his hand, and stands there poised like that for a long moment. Finally he snaps his fingers. The doors open. He smiles slowly and walks in, joining Donna. Then he snaps his fingers again, and the doors close. River's voice continues over this.) Now and then, every once in a very long while, every day in a million days, when the wind stands fair, and the Doctor comes to call... everybody lives. "
― Steven Moffat
14
" Clara Oswald: This is just a dream, but very clever people can hear dreams. So please, just listen. I know you're afraid, but being afraid is all right, because didn't anybody ever tell you fear is a superpower? Fear can make you faster and cleverer and stronger.
And one day, you'll come back to this barn and on that day you're going to be very afraid indeed. But that's ok because if you're very wise and very strong, fear doesn't have to make you cruel or cowardly. Fear can make you kind.
It doesn't matter if there's nothing under the bed or in the dark, so long as you know it's ok to be afraid of it. You're always going to be afraid, even if you learn to hide it. Fear is like a companion, a constant companion, always there. But that's ok, because fear can bring us together.
Fear can bring you home.
I'm going to leave you with something just so you always remember: Fear makes companions of us all. -Listen, Doctor Who, episode 8.4 "
― Steven Moffat