“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 people that you used to be.”
Steven Moffat wrote the episode The Time of the Doctor, in which the Doctor (played by Matt Smith) spoke the above words.
“If you can’t explain it simply, you don’t understand it well enough.”
Brownie points for anyone who spots the deliberate irony of the text in the picture.
It’s far too easy to prejudge someone.
“Never cruel or cowardly. Never give up, never give in.”
The Doctor’s Promise
Steven Moffat wrote the episode The Day of the Doctor, in which two of the Doctors (played by David Tennant and John Hurt) uttered the above promise.