Well, think of it this way: if you were to lose all the extra weight in a couple of days, you wouldn't appreciate the end result and you'd probably gain it all back just as quickly. Working hard for it means you'll be much more satisfied once you reach your goal, and truly proud of yourself for doing such an amazing job. Your self esteem will get a major boost
All great things in life require effort, that's how we know they're worth it!