Did you know that, among the handful of programs I continually have running, there is always a dictionary program active on my laptop Oh, sure, there are tons of great web sites out there for looking up words -- and I do use those regularly. But, I just like my handy-dandy dictionary program. It's instant (no waiting for pages to load, etc.), it's ad-free, and it and has a great? -- no, scratch that, a tantalizing! -- thesaurus as well.
Anyway, here's what my trusty friend, the American Heritage Dictionary, has to say about the phrase "will power":