Keep remember on your head that earning money is hard and many people out there that don't have money, so you must wise use your money on gambling and think twice about it.
Correct, and not just that earning money is hard here, but you really need the courage in yourself if you are actually willing to quit it, else doing it effortlessly will not result into anything and the scene will always remain the same.
The motivator that would help us to quit successfully is by reflecting on our negative experience in gambling, think of your loses and what could have you done with those money if you did not gamble it, with that you can think that you need to quit to stop your loses and gambling is not for you, you can move on for a more productive activities that would give you profit.