In other words, make gambling just for fun, fun here does not mean not losing money because it is impossible not to lose money in gambling, but if gamblers can consider this as fun then it will not damage their finances which is very likely to happen because they want to recover their losses because they cannot accept it, so accept defeat like we accept victory so that we can stop at any time.
Actually those gamblers that focuses on winning only are the type of gamblers that gamble for profits, so it's very hard for them to accept their losses. However, when a gambler have wagered and lose, he or she is supposed to know that gamble is not a game that will provide steady winning for them. A gambler can only win when he's lucky and when you are not 100% lucky there's no amount of try or hard works that will ever make you win. So the important knowledge a gambler should have is to know that gamble is for fun and also know the specific amount that they can afford to risk.