If you think that the most painful day is the worst day ever then you are wrong. We all know that winning is good for us but did you know that lose can give you an experience and knowledge? Losing day is not the worst because the worst is the day when you did nothing because nothingness can only give you nothingness. If you lose, rest then play again and try to regain what you've lost. Even the best gambler can also lose because the odds of winning never goes 100%.
Yes, I agree that winning is good for us, but we can not always win in gambling games. We can only try playing gambling and let the result will come to us, so we don't have to think if we will win in the end or we will lose the money.
Yes, I agree that losing can give us experience and knowledge, so next time you gamble, you will know how to prevent the big losses. But not many people can take a break for a while because they think they can win in the next rounds. So, we should have control over ourselves.