"You know when sometimes, you meet someone - and then you actually talk to them and five minutes later they're as dull as a brick; but then there's other people. And you meet them and think 'Not bad, they're okay' and then when you get to know them... their face just sort of becomes them, like their personality written all over it, and they just - they turn into something sir beautiful" - Amy Pond 

“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’ve got to 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.” – The 11th Doctor

“The way I see it, every life is a pile of good things and bad things. The good things don’t always soften the bad things, but vice versa, the bad things don’t always spoil the good things and make them unimportant.” – The 11th Doctor

"You want weapons? We're in a library! Books! The best weapons in the world!" - The 10th Doctor