What does it take?

One of the best movies I have seen lately got me thinking: what does it take to succeed? To succeed to an extent that there is at least one person who believes completely in you and has great respect for you? And that person(s) is willing to do anything for you? How much can you push yourself in terms of committment, dedication and hard work to achieve your goal(s) (including non-professional)? At what point do you start to lose belief in yourself? How much can you stand by your principles, despite formidable circumstances? How much can you train yourself to not get mentally exhausted? How much inspiration can you institute in other people?

What does it take to make people remember you as a person they would never-ever forget?