Professing to stop gambling is not what we can say and expect to take effect as immediately, instead, it requires some procedures in which we may have to go through before things can be in order as we have expected of them, for no reason as well should a responsible gambler think of stopping, because gambling gives its own entertainment and there's much of fun in it than never, which I don't see a reason why one should stop to gamble except by using an approach to mitigate it's effects.
I have read dozens of articles about gambling addicts and not one of them has ever said anything about a statement that would stop him from entering a casino. I mean what is called in my country "self-prohibition of gambling". I think many gamblers know about this but do not believe in the effectiveness of this method, because it does not consist of the gambler's faith in himself, but the opposite.