Never Lose Reason for your journey.
Never stop dreaming
Doctor Who
No matter how long he has ran he never stop running. Almost 1,000 years of time and space he has never stop remembering why he is running. No Matter how much pain and loss he has ever had he is still running.
"I'm not running away. But this is one corner of one country on one continent on one planet that's a corner of a galaxy that's a corner of a universe that is forever growing and shrinking and creating and destroying and never remaining the same for a single millisecond, and there is so much, so much, to see, Amy. Because it goes so fast. I'm not running away from things, I am running to them. Before they flare and fade forever. And it's alright. Our lives won't run the same. They can't. One day, soon, maybe, you'll stop. I've known for a while."
--The Doctor