DOCTOR: Mind over matter. Or more accurately, I have a mind and you don’t matter.

DOCTOR: Never be cruel. Never be cowardly. Hate is always foolish. Love is always wise. Always try to be nice, but never fail to be kind.

DOCTOR: A straight line may be the shortest distance between two points, but it is by no means the most interesting.

DOCTOR: Courage isn’t just a matter of not being frightened, you know. It’s being afraid and doing what you have to do anyway.

DOCTOR: Logic, my dear Zoe, merely enables one to be wrong with authority.