Motivation vs Discipline
Motivation - 1) the general desire or willingness of someone to do something.
Discipline - 1) train oneself to do something in a controlled and habitual way.
Read this link, it will explain it better: http://www.wisdomination.com/screw-motivation-what-you-need-is-discipline/
Interesting topic but I have very mixed feelings about the article.
Discipline is useful when you have to accomplish unpleasant tasks, however, if you apply this to learning a language for example, I strongly believe that a disciplined learner will never outperform someone who is highly motivated and loves learning and practicing (it can be love for the language or even for the process of learning by the way). While writing this I realize there should be a third option: passion. With passion, motivation and discipline will follow naturally.
Of course being passionate about filling in paperwork seems silly for most people but learning a language shouldn't feel like the same kind of chore.