Based on the OP, explain and question which is if we're to believe in luck and continue to play the game, or follow the rules.
I believe every gambler that have the impression of continuing with the game has already lost the game from the get-go because s/he breaks his/her own rules, and rules are to be set in stone. Besides, the gambler is on the verge of addiction because if the gambler can't follow his/her own rules, how can s/he follow the rules of gambling profitably?
Stop in time need awareness that we can only treat gambling as a fun thing. If you already fun in the games, you should stop it no matter what the result is so you can save the rest of your money. It is not good if you spend all of your money at a day even if you have much money.
Stop in time actually means mental awareness about the concept that the house edge is always in favor of the casino, and every opportunity not seized will lead to a loss.