We've all been told in one version or another to "never give up." It's so much of a platitude that I think we just sort of gloss over it and say, yeah, sure, I'll keep going. But I think we either don't really believe it or don't really think it will work.
This young woman is evidence that you should NEVER give up. Watch how she trips over a hurdle and then just gets back up and keeps moving. It's simple but pretty inspiring if you ask me.