Yes it is not adaptable to take stress about anything in gambling as it is the only way to make money for yourself. When you will become so positive and will get under pressure you will make mistakes so be patient and stay mentally calm while gambling. Being emotional is also bad because in any additional earning emotions should not be.
Even though we are too positive with our self but we don't do anything to work it well, it simply is nothing and we can just rely on luck as it is not present all the time. Thus, gambling isn't a place to rely upon financial resources but to consider as a place that we could enjoy playing.
A place to enjoy only if you're not going to be addicted in any course, you can stay positive even you lose your money thinking that you gain enjoyment in returned but if you'll take the other side of of this activities and you play for making money that will be the turning point where you will suffer from stress since your positivity will begin to be replaced by emotions that will caused wrong decision while playing inside.