Am I the only one who's never noticed this similarity?

If you can't fly, the run.
If you can't run, then walk.
If you can't walk, then crawl,
but whatever yiou do,
me must keep moving forward.
    - Dr. Martin Luther King, Jr.

Tracey: When you can't run, you crawl, and when you can't crawl - when you can't do that...
Zoë: You find someone to carry you.
    - Joss Whedon's Firefly