How bad do you want it?!?
My interpretation: "Everyone wants things but few are willing to work hard for it"
It's very easy to say I want to be fit or I want to have a business, but are you really willing to put in the hard work that it will take?
Most people aren't willing to do this, they don't have the PERSISTENCE or DISCIPLINE that it takes to get the best out of life.
I think it's tricky to find a good balance between being obsessed with something and not working at all towards achieving what you want in life. In general most people are at the end of the spectrum were they will not be disciplined enough to strive towards what the really want, satisfying them self's with mediocrity.
Though at the other end you have people who never stop and enjoy the things that they have managed to achieve and just constantly strive for more and more. This is not optimal either, i think we have to find a good balance that works for us and live are life in accordingly.
CONCLUSION: If you want something in life you have to realise that simply wanting it is not enough, you have to want it enough to be able to take action and work hard for it!