It takes more than just Thinking to quit gambling. Gambling is an addiction hard to give up, you must think of the right reasons, reasons that really motivates you to give it up otherwise, it will be in vain.
Yeah it is right when someone become addicted then quitting gambling is not easy. It is very hard to give up gambling easily. Losing and winning are almost same for gambler and he just think of gambling every time. After a huge lose in gambling a gambler some time quit his life and commit suicide because of huge debts which he never recover in his life.