The term "grit" has been floating around in the educational realm quite a bit lately. Not only do the article and the TED talk linked below shed some light on its applicability to our work, it's actually also something that can carry over into every aspect of our lives. You'll find that the TED talk is quick and engaging, while the article is certainly more weighty.
What is Grit? Watch this: http://www.ted.com/talks/angela_lee_duckworth_the_key_to_success_grit
Here's an article too: http://www.nytimes.com/2011/09/18/magazine/what-if-the-secret-to-success-is-failure.html?pagewanted=all&_r=0
Now you can assess your own Grit: