Moxie

Snagged the photo here. The etymology of the word is kind of awesome.

And in case you didn't know, Ted Williams is sometimes called the greatest hitter that ever lived. 

Moxie: bold vigor or courage; force of determination or character; energy; pep; courage; spirit; know-how; expertise; backbone; guts.1, 2 

I Should Probably Have More of this Word in my Life. Literally and Figuratively.