You need to control yourself whether you are lucky or not, it's a big challenge but it's a must because it's what we called responsible gambling. The hardest part to control ourselves if we are already losing, and yet we still gambling because we want to win back our losses, sometimes it will lead to bigger problems and I experienced it myself.
Luck is not with us all the time in gambling, but we should be discipline all the time, it's a must.
Stadus have a point... being lucky or unlucky are two sides of the same coin! It's hard to keep control when you are losing, and from my experience, it's hard to keep control when you are winning! Many of us had a situation where we won some decent amount, but instead of cashing out, we continued to gamble, with raised bets... to win even more... but in the end, we just lose what we won and what we deposited!
I guess we should be disciplined all the time, but it's hard... especially when we are in a good mood and ready to risk what we have for some entertainment and possible big wins!