This may not be what you think.  It's nothing to do with determination or self-discipline, this episode looks at the "essence" of what it takes to really succeed, to get what we want, to be happy!  Yes it is about getting what we want, however consider the reason we want many things is because we think it will make us happy AND how often do you see people getting what they said they wanted only for it to not be enough or for them to be left unfulfilled.