Why are so many people’s emotions so unstable?

Cat Brother has been observing some things.
For example, we have always treated:
results
as:
our own worth
Cat Brother used to be like this too.
For example, when I made money trading stocks for tens of thousands,
I felt like I was invincible.
When I lost tens of thousands,
I felt like I was worthless.
Back then, there was an ex-girlfriend and Cat Brother was together with her.
She looked at me, smiling, and said something:
“Why do you look like a king one moment,
and like a deflated balloon the next?”
At the time, I knew that I really was like that, but I didn’t know how to control my emotions.
Much later, after many years,
Cat Brother finally understood:
what really controlled my emotions had nothing to do with whether I made or lost money,
or whether life was at a peak or a low point.
It was just that Cat Brother tied his own worth
to the outcome.
When it succeeded,
Cat Brother felt he was really capable.
When it failed,
he felt he was nothing at all.
Slowly, Cat Brother finally learned one thing:
to separate results from who he is.
If I fail today, it doesn’t mean I’m a failed person—it only means I’ve temporarily stopped achieving success.
If I make money today,
it doesn’t mean I’m nobler than others—it only means I temporarily did one thing right.
So Cat Brother thinks:
a truly mature person may fail, but won’t deny themselves because of failure.
So today,
no matter how much I make, no matter how much I lose,
whether I’m at a low point in life or a high point,
Cat Brother tries to remind himself of one thing:
If I go do something, it can fail. No one can succeed every day, and not every time. No matter what, I don’t need to deny myself.
Cat Brother feels
this might be one of the most important lessons he learned over the past few years.
What do you think, everyone?